diff --git a/src/__tests__/api/analytics/since-cap.test.ts b/src/__tests__/api/analytics/since-cap.test.ts
index 1c9c0f996..0bfd4adb1 100644
--- a/src/__tests__/api/analytics/since-cap.test.ts
+++ b/src/__tests__/api/analytics/since-cap.test.ts
@@ -46,10 +46,6 @@ vi.mock("@/lib/auth/audit", () => ({
   auditLog: vi.fn().mockResolvedValue(undefined),
 }));
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
 
 // The slim slice now strips disabled-module types before answering, from
diff --git a/src/__tests__/api/auth/login/mfa-branch.test.ts b/src/__tests__/api/auth/login/mfa-branch.test.ts
index 1b9a644e1..3fdb91dd0 100644
--- a/src/__tests__/api/auth/login/mfa-branch.test.ts
+++ b/src/__tests__/api/auth/login/mfa-branch.test.ts
@@ -23,9 +23,6 @@ vi.mock("@/lib/auth/audit", () => ({
   auditLog: vi.fn().mockResolvedValue(undefined),
 }));
 vi.mock("@/lib/auth/hmac", () => ({ hashToken: vi.fn(() => "h") }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
 vi.mock("@/lib/rate-limit", () => ({
   checkAuthSurfaceRateLimit: vi.fn().mockResolvedValue({
diff --git a/src/__tests__/api/auth/mfa/verify.test.ts b/src/__tests__/api/auth/mfa/verify.test.ts
index 094614336..d23956b80 100644
--- a/src/__tests__/api/auth/mfa/verify.test.ts
+++ b/src/__tests__/api/auth/mfa/verify.test.ts
@@ -3,9 +3,6 @@ import { describe, it, expect, vi, beforeEach } from "vitest";
 vi.mock("@/lib/db", () => ({
   prisma: { user: { findUnique: vi.fn() } },
 }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
 vi.mock("@/lib/auth/audit", () => ({
   auditLog: vi.fn().mockResolvedValue(undefined),
diff --git a/src/__tests__/api/auth/registration-status/route.test.ts b/src/__tests__/api/auth/registration-status/route.test.ts
index 38f04e448..4eac4cf0c 100644
--- a/src/__tests__/api/auth/registration-status/route.test.ts
+++ b/src/__tests__/api/auth/registration-status/route.test.ts
@@ -37,10 +37,6 @@ vi.mock("@/lib/auth/audit", () => ({
   auditLog: vi.fn().mockResolvedValue(undefined),
 }));
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
 
 vi.mock("next/headers", () => ({
diff --git a/src/__tests__/baselines/version-stamp-comments.json b/src/__tests__/baselines/version-stamp-comments.json
index 69c0ee030..b95f224f2 100644
--- a/src/__tests__/baselines/version-stamp-comments.json
+++ b/src/__tests__/baselines/version-stamp-comments.json
@@ -1959,7 +1959,6 @@
     "lib/day/values.ts": 1,
     "lib/day/visit-preparation.ts": 1,
     "lib/day/wire-schemas.ts": 1,
-    "lib/db-compat.ts": 1,
     "lib/devices/__tests__/revoke.test.ts": 1,
     "lib/devices/revoke.ts": 1,
     "lib/doctor-report-helpers.ts": 1,
diff --git a/src/__tests__/sql-now-utc-guard.test.ts b/src/__tests__/sql-now-utc-guard.test.ts
index 4dca58fec..8875c0007 100644
--- a/src/__tests__/sql-now-utc-guard.test.ts
+++ b/src/__tests__/sql-now-utc-guard.test.ts
@@ -47,10 +47,6 @@ const ALLOWED: Record<string, { hits: number; why: string }> = {
     hits: 1,
     why: "pg-boss tables are timestamptz",
   },
-  "src/lib/db-compat.ts": {
-    hits: 1,
-    why: "DDL default on a timestamptz column",
-  },
 };
 
 const SQL_CLOCK =
diff --git a/src/__tests__/tz-day-paths-harness.test.ts b/src/__tests__/tz-day-paths-harness.test.ts
index edd870974..6be62ece6 100644
--- a/src/__tests__/tz-day-paths-harness.test.ts
+++ b/src/__tests__/tz-day-paths-harness.test.ts
@@ -65,9 +65,6 @@ vi.mock("@/lib/rollups/measurement-read", () => ({
 vi.mock("@/lib/analytics/mood-series", () => ({
   buildMoodDailySeries: vi.fn(),
 }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/admin/import-apple-health-export/__tests__/route.test.ts b/src/app/api/admin/import-apple-health-export/__tests__/route.test.ts
index fcb453ed6..dcbada60d 100644
--- a/src/app/api/admin/import-apple-health-export/__tests__/route.test.ts
+++ b/src/app/api/admin/import-apple-health-export/__tests__/route.test.ts
@@ -12,9 +12,6 @@ vi.mock("@/lib/auth/audit", () => ({
   auditLog: vi.fn().mockResolvedValue(undefined),
 }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/admin/maintenance/measurements/__tests__/status.test.ts b/src/app/api/admin/maintenance/measurements/__tests__/status.test.ts
index b4cb3012e..26de3e9e7 100644
--- a/src/app/api/admin/maintenance/measurements/__tests__/status.test.ts
+++ b/src/app/api/admin/maintenance/measurements/__tests__/status.test.ts
@@ -12,9 +12,6 @@ vi.mock("@/lib/auth/audit", () => ({
   auditLog: vi.fn().mockResolvedValue(undefined),
 }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/admin/maintenance/pulse-day-mean/__tests__/route.test.ts b/src/app/api/admin/maintenance/pulse-day-mean/__tests__/route.test.ts
index 26c89266e..e3c764f42 100644
--- a/src/app/api/admin/maintenance/pulse-day-mean/__tests__/route.test.ts
+++ b/src/app/api/admin/maintenance/pulse-day-mean/__tests__/route.test.ts
@@ -18,9 +18,6 @@ vi.mock("@/lib/auth/audit", () => ({
 }));
 vi.mock("@/lib/jobs/boss-instance", () => ({ getGlobalBoss: vi.fn() }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/admin/settings/assistant-flags/__tests__/route.test.ts b/src/app/api/admin/settings/assistant-flags/__tests__/route.test.ts
index 350c54de8..c23eb48c5 100644
--- a/src/app/api/admin/settings/assistant-flags/__tests__/route.test.ts
+++ b/src/app/api/admin/settings/assistant-flags/__tests__/route.test.ts
@@ -15,9 +15,6 @@ vi.mock("@/lib/auth/audit", () => ({
   auditLog: vi.fn().mockResolvedValue(undefined),
 }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/admin/settings/module-availability/__tests__/route.test.ts b/src/app/api/admin/settings/module-availability/__tests__/route.test.ts
index 846061632..fa2f7278e 100644
--- a/src/app/api/admin/settings/module-availability/__tests__/route.test.ts
+++ b/src/app/api/admin/settings/module-availability/__tests__/route.test.ts
@@ -15,9 +15,6 @@ vi.mock("@/lib/auth/audit", () => ({
   auditLog: vi.fn().mockResolvedValue(undefined),
 }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/analytics/__tests__/route.test.ts b/src/app/api/analytics/__tests__/route.test.ts
index 068af6252..c04a111c9 100644
--- a/src/app/api/analytics/__tests__/route.test.ts
+++ b/src/app/api/analytics/__tests__/route.test.ts
@@ -75,10 +75,6 @@ vi.mock("@/lib/auth/audit", () => ({
 
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("@/lib/insights/correlation-patterns", () => ({
   PATTERN_FAMILIES: { fixed: "FIXED" },
   syncAcceptedPatterns: vi.fn().mockResolvedValue(new Map()),
diff --git a/src/app/api/auth/login/__tests__/constant-work.test.ts b/src/app/api/auth/login/__tests__/constant-work.test.ts
index a41edac7b..39446e467 100644
--- a/src/app/api/auth/login/__tests__/constant-work.test.ts
+++ b/src/app/api/auth/login/__tests__/constant-work.test.ts
@@ -58,10 +58,6 @@ vi.mock("@/lib/rate-limit", () => ({
   refundRateLimit: vi.fn(async () => undefined),
 }));
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("@/lib/auth/hmac", () => ({
   hashToken: vi.fn(() => "aa".repeat(32)),
 }));
diff --git a/src/app/api/auth/login/__tests__/native-token.test.ts b/src/app/api/auth/login/__tests__/native-token.test.ts
index 4478b89eb..c0ca5e861 100644
--- a/src/app/api/auth/login/__tests__/native-token.test.ts
+++ b/src/app/api/auth/login/__tests__/native-token.test.ts
@@ -61,10 +61,6 @@ vi.mock("@/lib/rate-limit", () => ({
   refundRateLimit: vi.fn(async () => undefined),
 }));
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("@/lib/auth/hmac", () => ({
   hashToken: vi.fn((raw: string) => `hashed:${raw}`),
 }));
@@ -90,7 +86,6 @@ import {
   checkAuthSurfaceRateLimit,
   rateLimitHeaders,
 } from "@/lib/rate-limit";
-import { ensureDbCompatibility } from "@/lib/db-compat";
 import { auditLog } from "@/lib/auth/audit";
 import { createSession } from "@/lib/auth/session";
 
@@ -136,7 +131,6 @@ beforeEach(() => {
     ip: "203.0.113.1",
   } as never);
   vi.mocked(rateLimitHeaders).mockReturnValue({} as never);
-  vi.mocked(ensureDbCompatibility).mockResolvedValue(undefined);
   vi.mocked(auditLog).mockResolvedValue(undefined as never);
   vi.mocked(createSession).mockResolvedValue("session-id");
 });
diff --git a/src/app/api/auth/login/__tests__/route.test.ts b/src/app/api/auth/login/__tests__/route.test.ts
index e9c8e3298..5de021855 100644
--- a/src/app/api/auth/login/__tests__/route.test.ts
+++ b/src/app/api/auth/login/__tests__/route.test.ts
@@ -52,10 +52,6 @@ vi.mock("@/lib/rate-limit", () => ({
   rateLimitHeaders: vi.fn(() => ({})),
 }));
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("@/lib/auth/hmac", () => ({
   // Return a deterministic hex string that does NOT echo the raw
   // value — mirrors the real HMAC-SHA256 shape. The audit row's
@@ -88,7 +84,6 @@ import {
   checkAuthSurfaceRateLimit,
   rateLimitHeaders,
 } from "@/lib/rate-limit";
-import { ensureDbCompatibility } from "@/lib/db-compat";
 
 const TYPED_EMAIL = "leaked-identifier@example.com";
 
@@ -117,7 +112,6 @@ beforeEach(() => {
     ip: "1.2.3.4",
   } as never);
   vi.mocked(rateLimitHeaders).mockReturnValue({} as never);
-  vi.mocked(ensureDbCompatibility).mockResolvedValue(undefined);
 });
 
 describe("POST /api/auth/login — auth.login.failed audit row (H-1)", () => {
diff --git a/src/app/api/auth/login/__tests__/trusted-device.test.ts b/src/app/api/auth/login/__tests__/trusted-device.test.ts
index 95b7a3492..49d89ff87 100644
--- a/src/app/api/auth/login/__tests__/trusted-device.test.ts
+++ b/src/app/api/auth/login/__tests__/trusted-device.test.ts
@@ -52,10 +52,6 @@ vi.mock("@/lib/rate-limit", () => ({
   refundRateLimit: vi.fn(async () => undefined),
 }));
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("@/lib/auth/hmac", () => ({ hashToken: vi.fn(() => "h") }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
 vi.mock("next/headers", () => ({
diff --git a/src/app/api/auth/login/route.ts b/src/app/api/auth/login/route.ts
index 4c8927f91..0f11f9daf 100644
--- a/src/app/api/auth/login/route.ts
+++ b/src/app/api/auth/login/route.ts
@@ -11,7 +11,6 @@ import {
 } from "@/lib/api-response";
 import { checkAuthSurfaceRateLimit, rateLimitHeaders } from "@/lib/rate-limit";
 import { beginAccountLoginAttempt } from "@/lib/auth/login-throttle";
-import { ensureDbCompatibility } from "@/lib/db-compat";
 import { NextRequest, NextResponse } from "next/server";
 import { apiHandler } from "@/lib/api-handler";
 import { annotate } from "@/lib/logging/context";
@@ -59,8 +58,6 @@ export const POST = apiHandler(async (request: NextRequest) => {
     );
   }
 
-  await ensureDbCompatibility();
-
   const { data: body, error: jsonError } = await safeJson(request, {
     maxBytes: 64 * 1024,
   });
diff --git a/src/app/api/auth/mfa/verify/route.ts b/src/app/api/auth/mfa/verify/route.ts
index 9ee262970..25cb920de 100644
--- a/src/app/api/auth/mfa/verify/route.ts
+++ b/src/app/api/auth/mfa/verify/route.ts
@@ -27,7 +27,6 @@ import { apiHandler } from "@/lib/api-handler";
 import { annotate } from "@/lib/logging/context";
 import { auditLog } from "@/lib/auth/audit";
 import { prisma } from "@/lib/db";
-import { ensureDbCompatibility } from "@/lib/db-compat";
 import { checkAuthSurfaceRateLimit, rateLimitHeaders } from "@/lib/rate-limit";
 import { finishLogin } from "@/lib/auth/login-response";
 import {
@@ -59,8 +58,6 @@ export const POST = apiHandler(async (request: NextRequest) => {
     });
   }
 
-  await ensureDbCompatibility();
-
   const { data: body, error: jsonError } = await safeJson(request, {
     maxBytes: 16 * 1024,
   });
diff --git a/src/app/api/auth/mfa/webauthn/verify/__tests__/route.test.ts b/src/app/api/auth/mfa/webauthn/verify/__tests__/route.test.ts
index fa86f7987..cf7f1ddf8 100644
--- a/src/app/api/auth/mfa/webauthn/verify/__tests__/route.test.ts
+++ b/src/app/api/auth/mfa/webauthn/verify/__tests__/route.test.ts
@@ -14,10 +14,6 @@ vi.mock("@/lib/db", () => ({
   prisma: { user: { findUnique: vi.fn() } },
 }));
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("@/lib/rate-limit", () => ({
   checkAuthSurfaceRateLimit: vi.fn(),
   rateLimitHeaders: vi.fn(() => ({})),
diff --git a/src/app/api/auth/mfa/webauthn/verify/options/route.ts b/src/app/api/auth/mfa/webauthn/verify/options/route.ts
index 2cd02aa6d..c6c8edd76 100644
--- a/src/app/api/auth/mfa/webauthn/verify/options/route.ts
+++ b/src/app/api/auth/mfa/webauthn/verify/options/route.ts
@@ -16,7 +16,6 @@ import { apiHandler } from "@/lib/api-handler";
 import { apiError, apiSuccess } from "@/lib/api-response";
 import { parseJsonBody } from "@/lib/api/body";
 import { annotate } from "@/lib/logging/context";
-import { ensureDbCompatibility } from "@/lib/db-compat";
 import { checkAuthSurfaceRateLimit, rateLimitHeaders } from "@/lib/rate-limit";
 import { loadActiveChallenge } from "@/lib/auth/mfa/challenge";
 import { createMfaAuthenticationOptions } from "@/lib/auth/mfa/webauthn";
@@ -37,8 +36,6 @@ export const POST = apiHandler(async (request: NextRequest) => {
     });
   }
 
-  await ensureDbCompatibility();
-
   const parsed = await parseJsonBody(request, mfaWebauthnLoginOptionsSchema, {
     maxBytes: 16 * 1024,
     message: "Invalid request",
diff --git a/src/app/api/auth/mfa/webauthn/verify/route.ts b/src/app/api/auth/mfa/webauthn/verify/route.ts
index d548c9c08..a19585bfe 100644
--- a/src/app/api/auth/mfa/webauthn/verify/route.ts
+++ b/src/app/api/auth/mfa/webauthn/verify/route.ts
@@ -25,7 +25,6 @@ import {
 import { annotate } from "@/lib/logging/context";
 import { auditLog } from "@/lib/auth/audit";
 import { prisma } from "@/lib/db";
-import { ensureDbCompatibility } from "@/lib/db-compat";
 import { checkAuthSurfaceRateLimit, rateLimitHeaders } from "@/lib/rate-limit";
 import { finishLogin } from "@/lib/auth/login-response";
 import {
@@ -57,8 +56,6 @@ export const POST = apiHandler(async (request: NextRequest) => {
     });
   }
 
-  await ensureDbCompatibility();
-
   const { data: body, error: jsonError } = await safeJson(request, {
     maxBytes: 64 * 1024,
   });
diff --git a/src/app/api/auth/native/token/__tests__/route.test.ts b/src/app/api/auth/native/token/__tests__/route.test.ts
index ea0f1361f..b1f733168 100644
--- a/src/app/api/auth/native/token/__tests__/route.test.ts
+++ b/src/app/api/auth/native/token/__tests__/route.test.ts
@@ -12,10 +12,6 @@ vi.mock("@/lib/db", () => ({
   prisma: { user: { findUnique: vi.fn() } },
 }));
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("@/lib/rate-limit", () => ({
   checkAuthSurfaceRateLimit: vi.fn(),
   rateLimitHeaders: vi.fn(() => ({})),
diff --git a/src/app/api/auth/native/token/route.ts b/src/app/api/auth/native/token/route.ts
index 606cfba38..f0199e82a 100644
--- a/src/app/api/auth/native/token/route.ts
+++ b/src/app/api/auth/native/token/route.ts
@@ -26,7 +26,6 @@ import { apiHandler } from "@/lib/api-handler";
 import { annotate } from "@/lib/logging/context";
 import { auditLog } from "@/lib/auth/audit";
 import { prisma } from "@/lib/db";
-import { ensureDbCompatibility } from "@/lib/db-compat";
 import { checkAuthSurfaceRateLimit, rateLimitHeaders } from "@/lib/rate-limit";
 import { isCookielessNativeCaller } from "@/lib/auth/native-client";
 import { isNativeClientRequest } from "@/lib/auth/issue-token";
@@ -74,8 +73,6 @@ export const POST = apiHandler(async (request: NextRequest) => {
     return invalidCode();
   }
 
-  await ensureDbCompatibility();
-
   // (3) Body — bounded, then the exact wire contract.
   const parsed = await parseJsonBody(request, nativeHandoffTokenSchema, {
     maxBytes: 16 * 1024,
diff --git a/src/app/api/auth/oidc/native/token/__tests__/route.test.ts b/src/app/api/auth/oidc/native/token/__tests__/route.test.ts
index 6fc48da0a..7b5daa67a 100644
--- a/src/app/api/auth/oidc/native/token/__tests__/route.test.ts
+++ b/src/app/api/auth/oidc/native/token/__tests__/route.test.ts
@@ -9,10 +9,6 @@ vi.mock("@/lib/db", () => ({
   prisma: { user: { findUnique: vi.fn() } },
 }));
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("@/lib/rate-limit", () => ({
   checkAuthSurfaceRateLimit: vi.fn(),
   rateLimitHeaders: vi.fn(() => ({})),
diff --git a/src/app/api/auth/oidc/native/token/route.ts b/src/app/api/auth/oidc/native/token/route.ts
index b3d480082..63b8ef1e9 100644
--- a/src/app/api/auth/oidc/native/token/route.ts
+++ b/src/app/api/auth/oidc/native/token/route.ts
@@ -29,7 +29,6 @@ import { apiHandler } from "@/lib/api-handler";
 import { annotate } from "@/lib/logging/context";
 import { auditLog } from "@/lib/auth/audit";
 import { prisma } from "@/lib/db";
-import { ensureDbCompatibility } from "@/lib/db-compat";
 import { checkAuthSurfaceRateLimit, rateLimitHeaders } from "@/lib/rate-limit";
 import { isCookielessNativeCaller } from "@/lib/auth/native-client";
 import { isNativeClientRequest } from "@/lib/auth/issue-token";
@@ -80,8 +79,6 @@ export const POST = apiHandler(async (request: NextRequest) => {
     return invalidCode();
   }
 
-  await ensureDbCompatibility();
-
   // (3) Body — bounded, then the exact wire contract.
   const parsed = await parseJsonBody(request, oidcNativeTokenSchema, {
     maxBytes: 16 * 1024,
diff --git a/src/app/api/auth/passkey/login-verify/__tests__/native-token.test.ts b/src/app/api/auth/passkey/login-verify/__tests__/native-token.test.ts
index 8256d35f2..b4216edfe 100644
--- a/src/app/api/auth/passkey/login-verify/__tests__/native-token.test.ts
+++ b/src/app/api/auth/passkey/login-verify/__tests__/native-token.test.ts
@@ -37,10 +37,6 @@ vi.mock("@/lib/rate-limit", () => ({
   checkAuthSurfaceRateLimit: vi.fn(),
 }));
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("@/lib/auth/hmac", () => ({
   hashToken: vi.fn((raw: string) => `hashed:${raw}`),
 }));
diff --git a/src/app/api/auth/passkey/login-verify/__tests__/oidc-only.test.ts b/src/app/api/auth/passkey/login-verify/__tests__/oidc-only.test.ts
index 5d451530f..72263e6ba 100644
--- a/src/app/api/auth/passkey/login-verify/__tests__/oidc-only.test.ts
+++ b/src/app/api/auth/passkey/login-verify/__tests__/oidc-only.test.ts
@@ -35,10 +35,6 @@ vi.mock("@/lib/rate-limit", () => ({
   checkAuthSurfaceRateLimit: vi.fn(),
 }));
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("@/lib/auth/hmac", () => ({
   hashToken: vi.fn((raw: string) => `hashed:${raw}`),
 }));
diff --git a/src/app/api/auth/passkey/login-verify/__tests__/refusals.test.ts b/src/app/api/auth/passkey/login-verify/__tests__/refusals.test.ts
index a41950f37..b7ff7fee6 100644
--- a/src/app/api/auth/passkey/login-verify/__tests__/refusals.test.ts
+++ b/src/app/api/auth/passkey/login-verify/__tests__/refusals.test.ts
@@ -31,10 +31,6 @@ vi.mock("@/lib/rate-limit", () => ({
   checkAuthSurfaceRateLimit: vi.fn(),
 }));
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
 
 vi.mock("next/headers", () => ({
diff --git a/src/app/api/auth/passkey/login-verify/route.ts b/src/app/api/auth/passkey/login-verify/route.ts
index 76c6487c4..b65593baf 100644
--- a/src/app/api/auth/passkey/login-verify/route.ts
+++ b/src/app/api/auth/passkey/login-verify/route.ts
@@ -9,7 +9,6 @@ import { recordSignInDevice } from "@/lib/auth/login-alert";
 import { auditLog } from "@/lib/auth/audit";
 import { apiSuccess, apiError, safeJson } from "@/lib/api-response";
 import { prisma } from "@/lib/db";
-import { ensureDbCompatibility } from "@/lib/db-compat";
 import { checkAuthSurfaceRateLimit } from "@/lib/rate-limit";
 import { NextRequest } from "next/server";
 import { apiHandler } from "@/lib/api-handler";
@@ -71,8 +70,6 @@ export const POST = apiHandler(async (request: NextRequest) => {
     });
   }
 
-  await ensureDbCompatibility();
-
   // v1.4.43 — tighter shared bucket on trust-chain misconfig.
   const rl = await checkAuthSurfaceRateLimit(
     request,
diff --git a/src/app/api/auth/password/__tests__/route.test.ts b/src/app/api/auth/password/__tests__/route.test.ts
index 5cee4d7cd..ab15ac964 100644
--- a/src/app/api/auth/password/__tests__/route.test.ts
+++ b/src/app/api/auth/password/__tests__/route.test.ts
@@ -63,9 +63,6 @@ vi.mock("@/lib/auth/hibp", () => ({
 }));
 
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/auth/register/__tests__/route.test.ts b/src/app/api/auth/register/__tests__/route.test.ts
index 00611fffc..3b435bf4b 100644
--- a/src/app/api/auth/register/__tests__/route.test.ts
+++ b/src/app/api/auth/register/__tests__/route.test.ts
@@ -72,9 +72,6 @@ vi.mock("@/lib/tz/resolver", () => ({
   resolveServerDefaultTimezone: vi.fn().mockResolvedValue("Europe/Berlin"),
 }));
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
diff --git a/src/app/api/auth/register/route.ts b/src/app/api/auth/register/route.ts
index 6e374033b..a50be77c2 100644
--- a/src/app/api/auth/register/route.ts
+++ b/src/app/api/auth/register/route.ts
@@ -12,7 +12,6 @@ import { auditLog } from "@/lib/auth/audit";
 import { apiSuccess, apiError } from "@/lib/api-response";
 import { parseJsonBody } from "@/lib/api/body";
 import { checkAuthSurfaceRateLimit, rateLimitHeaders } from "@/lib/rate-limit";
-import { ensureDbCompatibility } from "@/lib/db-compat";
 import { NextRequest, NextResponse } from "next/server";
 import { apiHandler } from "@/lib/api-handler";
 import { annotate } from "@/lib/logging/context";
@@ -79,8 +78,6 @@ export const POST = apiHandler(async (request: NextRequest) => {
     );
   }
 
-  await ensureDbCompatibility();
-
   const userCount = await prisma.user.count();
 
   // Check if registration is enabled.
diff --git a/src/app/api/biomarkers/[id]/__tests__/delete-record-auth.test.ts b/src/app/api/biomarkers/[id]/__tests__/delete-record-auth.test.ts
index 3b9cb8f7a..468bb14ea 100644
--- a/src/app/api/biomarkers/[id]/__tests__/delete-record-auth.test.ts
+++ b/src/app/api/biomarkers/[id]/__tests__/delete-record-auth.test.ts
@@ -33,9 +33,6 @@ vi.mock("@/lib/auth/audit", () => ({
   auditLog: vi.fn().mockResolvedValue(undefined),
 }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("@/lib/cache/invalidate", () => ({
   invalidateUserHealthScore: vi.fn(),
 }));
diff --git a/src/app/api/biomarkers/[id]/__tests__/route.test.ts b/src/app/api/biomarkers/[id]/__tests__/route.test.ts
index 46a840f1f..bf781ebbc 100644
--- a/src/app/api/biomarkers/[id]/__tests__/route.test.ts
+++ b/src/app/api/biomarkers/[id]/__tests__/route.test.ts
@@ -32,10 +32,6 @@ vi.mock("@/lib/auth/audit", () => ({
 
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("@/lib/labs/biomarker-store", () => ({
   encryptContextToBytes: vi.fn(() => new Uint8Array([1])),
   decryptContextFromBytes: vi.fn(() => "ctx"),
diff --git a/src/app/api/biomarkers/__tests__/error-contract.test.ts b/src/app/api/biomarkers/__tests__/error-contract.test.ts
index dcbfe3362..4f4e1506b 100644
--- a/src/app/api/biomarkers/__tests__/error-contract.test.ts
+++ b/src/app/api/biomarkers/__tests__/error-contract.test.ts
@@ -31,9 +31,6 @@ vi.mock("@/lib/labs/biomarker-store", () => ({
   encryptContextToBytes: vi.fn(),
 }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/c/[token]/unlock/__tests__/route.test.ts b/src/app/api/c/[token]/unlock/__tests__/route.test.ts
index e7cf2ef56..317199c29 100644
--- a/src/app/api/c/[token]/unlock/__tests__/route.test.ts
+++ b/src/app/api/c/[token]/unlock/__tests__/route.test.ts
@@ -37,10 +37,6 @@ vi.mock("@/lib/rate-limit", () => ({
   checkAuthSurfaceRateLimit: vi.fn(),
 }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 import { POST } from "../route";
 import { resolveShareGateState } from "@/lib/clinician-share/resolve-share-token";
 import { verifyPassphrase } from "@/lib/clinician-share/passphrase";
diff --git a/src/app/api/coach/plans/__tests__/route.test.ts b/src/app/api/coach/plans/__tests__/route.test.ts
index 6738a2a44..6d3885d21 100644
--- a/src/app/api/coach/plans/__tests__/route.test.ts
+++ b/src/app/api/coach/plans/__tests__/route.test.ts
@@ -54,10 +54,6 @@ vi.mock("@/lib/logging/transports", () => ({
   emitIfSampled: vi.fn(),
 }));
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("@/lib/logging/context", async (importOriginal) => {
   const actual = await importOriginal<typeof import("@/lib/logging/context")>();
   return { ...actual, annotate: vi.fn() };
diff --git a/src/app/api/coach/reminders/__tests__/route.test.ts b/src/app/api/coach/reminders/__tests__/route.test.ts
index 2bdea457f..9e3391106 100644
--- a/src/app/api/coach/reminders/__tests__/route.test.ts
+++ b/src/app/api/coach/reminders/__tests__/route.test.ts
@@ -48,9 +48,6 @@ vi.mock("@/lib/ai/coach/bytes-codec", () => ({
   encryptToBytes: vi.fn((s: string) => new Uint8Array(Buffer.from(`enc:${s}`))),
 }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("@/lib/logging/context", async (importOriginal) => {
   const actual = await importOriginal<typeof import("@/lib/logging/context")>();
   return { ...actual, annotate: vi.fn() };
diff --git a/src/app/api/coach/suggested-actions/__tests__/route.test.ts b/src/app/api/coach/suggested-actions/__tests__/route.test.ts
index d1f49c9a0..e629d2c44 100644
--- a/src/app/api/coach/suggested-actions/__tests__/route.test.ts
+++ b/src/app/api/coach/suggested-actions/__tests__/route.test.ts
@@ -48,9 +48,6 @@ vi.mock("@/lib/measurement-reminders/dto", () => ({
   toMeasurementReminderDto: vi.fn((r: { id: string }) => ({ id: r.id })),
 }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("@/lib/logging/context", async (importOriginal) => {
   const actual = await importOriginal<typeof import("@/lib/logging/context")>();
   return { ...actual, annotate: vi.fn() };
diff --git a/src/app/api/consent/ai/__tests__/route.test.ts b/src/app/api/consent/ai/__tests__/route.test.ts
index c3b9b9ba1..bcfb7341f 100644
--- a/src/app/api/consent/ai/__tests__/route.test.ts
+++ b/src/app/api/consent/ai/__tests__/route.test.ts
@@ -36,10 +36,6 @@ vi.mock("@/lib/auth/audit", () => ({
 
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/consent/ai/latest/__tests__/route.test.ts b/src/app/api/consent/ai/latest/__tests__/route.test.ts
index fcbf29309..c34d9cc2c 100644
--- a/src/app/api/consent/ai/latest/__tests__/route.test.ts
+++ b/src/app/api/consent/ai/latest/__tests__/route.test.ts
@@ -40,10 +40,6 @@ vi.mock("@/lib/auth/audit", () => ({
 
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/consent/ai/web/__tests__/route.test.ts b/src/app/api/consent/ai/web/__tests__/route.test.ts
index 4b101efd5..d6ab7b671 100644
--- a/src/app/api/consent/ai/web/__tests__/route.test.ts
+++ b/src/app/api/consent/ai/web/__tests__/route.test.ts
@@ -8,10 +8,6 @@ vi.mock("@/lib/auth/audit", () => ({
 
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/custom-metrics/[id]/__tests__/route.test.ts b/src/app/api/custom-metrics/[id]/__tests__/route.test.ts
index bc70c9d62..76d08eb28 100644
--- a/src/app/api/custom-metrics/[id]/__tests__/route.test.ts
+++ b/src/app/api/custom-metrics/[id]/__tests__/route.test.ts
@@ -16,10 +16,6 @@ vi.mock("@/lib/auth/audit", () => ({
 
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/custom-metrics/[id]/entries/__tests__/note-encryption.test.ts b/src/app/api/custom-metrics/[id]/entries/__tests__/note-encryption.test.ts
index 89609be1b..ec03e0a59 100644
--- a/src/app/api/custom-metrics/[id]/entries/__tests__/note-encryption.test.ts
+++ b/src/app/api/custom-metrics/[id]/entries/__tests__/note-encryption.test.ts
@@ -37,10 +37,6 @@ vi.mock("@/lib/auth/audit", () => ({
 
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("@/lib/idempotency", () => ({
   withIdempotency: (fn: unknown) => fn,
 }));
diff --git a/src/app/api/custom-metrics/[id]/entries/__tests__/route.test.ts b/src/app/api/custom-metrics/[id]/entries/__tests__/route.test.ts
index 2f02eb2b3..a416eb63e 100644
--- a/src/app/api/custom-metrics/[id]/entries/__tests__/route.test.ts
+++ b/src/app/api/custom-metrics/[id]/entries/__tests__/route.test.ts
@@ -32,10 +32,6 @@ vi.mock("@/lib/auth/audit", () => ({
 
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("@/lib/idempotency", () => ({
   withIdempotency: (fn: unknown) => fn,
 }));
diff --git a/src/app/api/custom-metrics/[id]/entries/__tests__/soft-delete-restore.test.ts b/src/app/api/custom-metrics/[id]/entries/__tests__/soft-delete-restore.test.ts
index 9794e159b..1cb0edf37 100644
--- a/src/app/api/custom-metrics/[id]/entries/__tests__/soft-delete-restore.test.ts
+++ b/src/app/api/custom-metrics/[id]/entries/__tests__/soft-delete-restore.test.ts
@@ -30,10 +30,6 @@ vi.mock("@/lib/auth/audit", () => ({
 
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("@/lib/cache/invalidate", () => ({
   invalidateUserCorrelationPatterns: vi.fn(),
 }));
diff --git a/src/app/api/custom-metrics/__tests__/route.test.ts b/src/app/api/custom-metrics/__tests__/route.test.ts
index 50ee33ccf..1a9a0492c 100644
--- a/src/app/api/custom-metrics/__tests__/route.test.ts
+++ b/src/app/api/custom-metrics/__tests__/route.test.ts
@@ -22,10 +22,6 @@ vi.mock("@/lib/auth/audit", () => ({
 
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("@/lib/idempotency", () => ({
   withIdempotency: (fn: unknown) => fn,
 }));
diff --git a/src/app/api/cycle/__tests__/external-id-floor.test.ts b/src/app/api/cycle/__tests__/external-id-floor.test.ts
index 5e1428830..9fe3b848c 100644
--- a/src/app/api/cycle/__tests__/external-id-floor.test.ts
+++ b/src/app/api/cycle/__tests__/external-id-floor.test.ts
@@ -64,9 +64,6 @@ vi.mock("@/lib/cycle/dto", async (importOriginal) => ({
   toMenstrualCycleDTO: vi.fn(() => ({ id: "cycle-1" })),
 }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/cycle/calendar/__tests__/day-entries.test.ts b/src/app/api/cycle/calendar/__tests__/day-entries.test.ts
index 48e25b400..bd64f018a 100644
--- a/src/app/api/cycle/calendar/__tests__/day-entries.test.ts
+++ b/src/app/api/cycle/calendar/__tests__/day-entries.test.ts
@@ -41,9 +41,6 @@ vi.mock("@/lib/rate-limit", () => ({
 }));
 vi.mock("@/lib/cycle/gate", () => ({ requireCycleEnabled: vi.fn() }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/cycle/calendar/__tests__/verdict-round-trip.test.ts b/src/app/api/cycle/calendar/__tests__/verdict-round-trip.test.ts
index 08f125662..ed1dced44 100644
--- a/src/app/api/cycle/calendar/__tests__/verdict-round-trip.test.ts
+++ b/src/app/api/cycle/calendar/__tests__/verdict-round-trip.test.ts
@@ -41,9 +41,6 @@ vi.mock("@/lib/rate-limit", () => ({
 }));
 vi.mock("@/lib/cycle/gate", () => ({ requireCycleEnabled: vi.fn() }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/cycle/day-logs/bulk/__tests__/route.test.ts b/src/app/api/cycle/day-logs/bulk/__tests__/route.test.ts
index 8b59f8fec..aaada8c8c 100644
--- a/src/app/api/cycle/day-logs/bulk/__tests__/route.test.ts
+++ b/src/app/api/cycle/day-logs/bulk/__tests__/route.test.ts
@@ -36,9 +36,6 @@ vi.mock("@/lib/cycle/day-log-write", () => ({
   upsertCycleDayLog: vi.fn(),
 }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/cycle/insights/__tests__/route-locale.test.ts b/src/app/api/cycle/insights/__tests__/route-locale.test.ts
index 0a516735c..4c44ed11e 100644
--- a/src/app/api/cycle/insights/__tests__/route-locale.test.ts
+++ b/src/app/api/cycle/insights/__tests__/route-locale.test.ts
@@ -67,10 +67,6 @@ vi.mock("@/lib/rate-limit", () => ({
   checkRateLimit: vi.fn(async () => ({ allowed: true })),
 }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const localeCookie = vi.fn<() => string | undefined>(() => undefined);
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
diff --git a/src/app/api/cycle/symptoms/custom/__tests__/custom-crud.test.ts b/src/app/api/cycle/symptoms/custom/__tests__/custom-crud.test.ts
index eec847a26..cf0c9bfc7 100644
--- a/src/app/api/cycle/symptoms/custom/__tests__/custom-crud.test.ts
+++ b/src/app/api/cycle/symptoms/custom/__tests__/custom-crud.test.ts
@@ -27,9 +27,6 @@ vi.mock("@/lib/auth/audit", () => ({
   auditLog: vi.fn().mockResolvedValue(undefined),
 }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("@/lib/cycle/gate", () => ({
   requireCycleEnabled: vi.fn(),
 }));
diff --git a/src/app/api/daily/digest/__tests__/route.test.ts b/src/app/api/daily/digest/__tests__/route.test.ts
index 10af3f903..1362d9554 100644
--- a/src/app/api/daily/digest/__tests__/route.test.ts
+++ b/src/app/api/daily/digest/__tests__/route.test.ts
@@ -28,9 +28,6 @@ vi.mock("@/lib/auth/audit", () => ({
   auditLog: vi.fn().mockResolvedValue(undefined),
 }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/daily/digest/dismiss/__tests__/route.test.ts b/src/app/api/daily/digest/dismiss/__tests__/route.test.ts
index 71b989788..6797ca8ac 100644
--- a/src/app/api/daily/digest/dismiss/__tests__/route.test.ts
+++ b/src/app/api/daily/digest/dismiss/__tests__/route.test.ts
@@ -40,9 +40,6 @@ vi.mock("@/lib/auth/audit", () => ({
   auditLog: vi.fn().mockResolvedValue(undefined),
 }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("@/lib/logging/context", async (importOriginal) => {
   const actual = await importOriginal<typeof import("@/lib/logging/context")>();
   return { ...actual, annotate: vi.fn() };
diff --git a/src/app/api/dashboard/chart-overlay-prefs/__tests__/route.test.ts b/src/app/api/dashboard/chart-overlay-prefs/__tests__/route.test.ts
index 29b6c0ccf..7d77f2585 100644
--- a/src/app/api/dashboard/chart-overlay-prefs/__tests__/route.test.ts
+++ b/src/app/api/dashboard/chart-overlay-prefs/__tests__/route.test.ts
@@ -22,9 +22,6 @@ vi.mock("@/lib/cache/invalidate", () => ({
   invalidateUserDashboardWidgets: vi.fn(),
 }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/dashboard/snapshot/__tests__/route.test.ts b/src/app/api/dashboard/snapshot/__tests__/route.test.ts
index e161146af..db2349498 100644
--- a/src/app/api/dashboard/snapshot/__tests__/route.test.ts
+++ b/src/app/api/dashboard/snapshot/__tests__/route.test.ts
@@ -26,9 +26,6 @@ vi.mock("@/lib/auth/session", () => ({
 vi.mock("@/lib/logging/transports", () => ({
   emitIfSampled: vi.fn(),
 }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/dashboard/summary/__tests__/module-gate.test.ts b/src/app/api/dashboard/summary/__tests__/module-gate.test.ts
index 90bbfee18..ba4647551 100644
--- a/src/app/api/dashboard/summary/__tests__/module-gate.test.ts
+++ b/src/app/api/dashboard/summary/__tests__/module-gate.test.ts
@@ -18,9 +18,6 @@ import { describe, it, expect, vi, beforeEach } from "vitest";
 
 vi.mock("@/lib/auth/session", () => ({ getSession: vi.fn() }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 // The gate resolver runs for real; only its data sources are stubbed, so the
 // module state is driven the way production drives it.
 vi.mock("@/lib/db", () => ({
diff --git a/src/app/api/dashboard/summary/__tests__/route.test.ts b/src/app/api/dashboard/summary/__tests__/route.test.ts
index c6fd2ca31..df9e71ef4 100644
--- a/src/app/api/dashboard/summary/__tests__/route.test.ts
+++ b/src/app/api/dashboard/summary/__tests__/route.test.ts
@@ -92,10 +92,6 @@ vi.mock("@/lib/analytics/mood-series", () => ({
   })),
 }));
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/dashboard/widgets/__tests__/route.test.ts b/src/app/api/dashboard/widgets/__tests__/route.test.ts
index 45777dd56..29ad25c97 100644
--- a/src/app/api/dashboard/widgets/__tests__/route.test.ts
+++ b/src/app/api/dashboard/widgets/__tests__/route.test.ts
@@ -58,10 +58,6 @@ vi.mock("@/lib/logging/transports", () => ({
   emitIfSampled: vi.fn(),
 }));
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("@/lib/logging/context", async (importOriginal) => {
   const actual = await importOriginal<typeof import("@/lib/logging/context")>();
   return {
diff --git a/src/app/api/devices/[id]/__tests__/route.test.ts b/src/app/api/devices/[id]/__tests__/route.test.ts
index 6f274a931..b6df569cb 100644
--- a/src/app/api/devices/[id]/__tests__/route.test.ts
+++ b/src/app/api/devices/[id]/__tests__/route.test.ts
@@ -29,10 +29,6 @@ vi.mock("@/lib/auth/audit", () => ({
 
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/devices/__tests__/route.test.ts b/src/app/api/devices/__tests__/route.test.ts
index ef65576c7..a06d413e0 100644
--- a/src/app/api/devices/__tests__/route.test.ts
+++ b/src/app/api/devices/__tests__/route.test.ts
@@ -37,10 +37,6 @@ vi.mock("@/lib/auth/audit", () => ({
 
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("@/lib/rate-limit", () => ({
   checkRateLimit: vi.fn().mockResolvedValue({
     allowed: true,
diff --git a/src/app/api/documents/inbound/[id]/__tests__/route.test.ts b/src/app/api/documents/inbound/[id]/__tests__/route.test.ts
index e9a75d030..1ccc9afd0 100644
--- a/src/app/api/documents/inbound/[id]/__tests__/route.test.ts
+++ b/src/app/api/documents/inbound/[id]/__tests__/route.test.ts
@@ -98,9 +98,6 @@ vi.mock("@/lib/auth/audit", () => ({
   auditLog: vi.fn().mockResolvedValue(undefined),
 }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/documents/inbound/[id]/chat/__tests__/route.test.ts b/src/app/api/documents/inbound/[id]/chat/__tests__/route.test.ts
index 823dd0fd6..c8f303f28 100644
--- a/src/app/api/documents/inbound/[id]/chat/__tests__/route.test.ts
+++ b/src/app/api/documents/inbound/[id]/chat/__tests__/route.test.ts
@@ -72,9 +72,6 @@ vi.mock("@/lib/auth/audit", () => ({
 }));
 vi.mock("@/lib/auth/session", () => ({ getSession: vi.fn() }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/documents/inbound/[id]/extract/__tests__/route.test.ts b/src/app/api/documents/inbound/[id]/extract/__tests__/route.test.ts
index 0506f136d..6789ff28f 100644
--- a/src/app/api/documents/inbound/[id]/extract/__tests__/route.test.ts
+++ b/src/app/api/documents/inbound/[id]/extract/__tests__/route.test.ts
@@ -96,9 +96,6 @@ vi.mock("@/lib/auth/audit", () => ({
   auditLog: vi.fn().mockResolvedValue(undefined),
 }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/documents/inbound/[id]/index/__tests__/route.test.ts b/src/app/api/documents/inbound/[id]/index/__tests__/route.test.ts
index 8307653b2..bbd04cc0c 100644
--- a/src/app/api/documents/inbound/[id]/index/__tests__/route.test.ts
+++ b/src/app/api/documents/inbound/[id]/index/__tests__/route.test.ts
@@ -76,9 +76,6 @@ vi.mock("@/lib/auth/audit", () => ({
   auditLog: vi.fn().mockResolvedValue(undefined),
 }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/documents/inbound/[id]/original/__tests__/route.test.ts b/src/app/api/documents/inbound/[id]/original/__tests__/route.test.ts
index fffc37bcc..617ad602c 100644
--- a/src/app/api/documents/inbound/[id]/original/__tests__/route.test.ts
+++ b/src/app/api/documents/inbound/[id]/original/__tests__/route.test.ts
@@ -46,9 +46,6 @@ vi.mock("@/lib/auth/audit", () => ({
   auditLog: vi.fn().mockResolvedValue(undefined),
 }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/documents/inbound/[id]/suggest/__tests__/route.test.ts b/src/app/api/documents/inbound/[id]/suggest/__tests__/route.test.ts
index bde68062a..7dbed6993 100644
--- a/src/app/api/documents/inbound/[id]/suggest/__tests__/route.test.ts
+++ b/src/app/api/documents/inbound/[id]/suggest/__tests__/route.test.ts
@@ -55,9 +55,6 @@ vi.mock("@/lib/auth/audit", () => ({
   auditLog: vi.fn().mockResolvedValue(undefined),
 }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/documents/inbound/[id]/summary/__tests__/route.test.ts b/src/app/api/documents/inbound/[id]/summary/__tests__/route.test.ts
index 9a0c0b309..62c7de63b 100644
--- a/src/app/api/documents/inbound/[id]/summary/__tests__/route.test.ts
+++ b/src/app/api/documents/inbound/[id]/summary/__tests__/route.test.ts
@@ -68,9 +68,6 @@ vi.mock("@/lib/auth/audit", () => ({
   auditLog: vi.fn().mockResolvedValue(undefined),
 }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/documents/inbound/[id]/thumbnail/__tests__/route.test.ts b/src/app/api/documents/inbound/[id]/thumbnail/__tests__/route.test.ts
index 5d31b1102..08f499b4b 100644
--- a/src/app/api/documents/inbound/[id]/thumbnail/__tests__/route.test.ts
+++ b/src/app/api/documents/inbound/[id]/thumbnail/__tests__/route.test.ts
@@ -48,9 +48,6 @@ vi.mock("@/lib/auth/audit", () => ({
   auditLog: vi.fn().mockResolvedValue(undefined),
 }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/documents/inbound/__tests__/route.test.ts b/src/app/api/documents/inbound/__tests__/route.test.ts
index 81319039f..a68945788 100644
--- a/src/app/api/documents/inbound/__tests__/route.test.ts
+++ b/src/app/api/documents/inbound/__tests__/route.test.ts
@@ -133,9 +133,6 @@ vi.mock("@/lib/auth/audit", () => ({
   auditLog: vi.fn().mockResolvedValue(undefined),
 }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/documents/inbound/layout/__tests__/route.test.ts b/src/app/api/documents/inbound/layout/__tests__/route.test.ts
index 41ca79b2b..1926696d4 100644
--- a/src/app/api/documents/inbound/layout/__tests__/route.test.ts
+++ b/src/app/api/documents/inbound/layout/__tests__/route.test.ts
@@ -27,10 +27,6 @@ vi.mock("@/lib/logging/transports", () => ({
   emitIfSampled: vi.fn(),
 }));
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("@/lib/modules/gate", () => ({
   requireModuleEnabled: vi.fn(),
 }));
diff --git a/src/app/api/documents/inbound/reindex/__tests__/route.test.ts b/src/app/api/documents/inbound/reindex/__tests__/route.test.ts
index dcdaad6ec..e908f1d1b 100644
--- a/src/app/api/documents/inbound/reindex/__tests__/route.test.ts
+++ b/src/app/api/documents/inbound/reindex/__tests__/route.test.ts
@@ -37,9 +37,6 @@ vi.mock("@/lib/auth/audit", () => ({
   auditLog: vi.fn().mockResolvedValue(undefined),
 }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/feature-flags/__tests__/route.test.ts b/src/app/api/feature-flags/__tests__/route.test.ts
index cec44a7be..8445347ba 100644
--- a/src/app/api/feature-flags/__tests__/route.test.ts
+++ b/src/app/api/feature-flags/__tests__/route.test.ts
@@ -9,10 +9,6 @@ vi.mock("@/lib/auth/audit", () => ({
 
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/fhir/__tests__/observation-series.test.ts b/src/app/api/fhir/__tests__/observation-series.test.ts
index 25fb76e6f..790ea1409 100644
--- a/src/app/api/fhir/__tests__/observation-series.test.ts
+++ b/src/app/api/fhir/__tests__/observation-series.test.ts
@@ -11,9 +11,6 @@ import { NextRequest } from "next/server";
 vi.mock("@/lib/auth/session", () => ({ getSession: vi.fn() }));
 vi.mock("@/lib/rate-limit", () => ({ checkRateLimit: vi.fn() }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("@/lib/modules/gate", () => ({
   requireModuleEnabled: vi.fn(),
   isModuleEnabled: vi.fn(),
diff --git a/src/app/api/fhir/__tests__/route.test.ts b/src/app/api/fhir/__tests__/route.test.ts
index 5d2fd4499..6279318b1 100644
--- a/src/app/api/fhir/__tests__/route.test.ts
+++ b/src/app/api/fhir/__tests__/route.test.ts
@@ -13,9 +13,6 @@ import { NextRequest } from "next/server";
 vi.mock("@/lib/auth/session", () => ({ getSession: vi.fn() }));
 vi.mock("@/lib/rate-limit", () => ({ checkRateLimit: vi.fn() }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("@/lib/modules/gate", () => ({
   requireModuleEnabled: vi.fn(),
   isModuleEnabled: vi.fn(),
diff --git a/src/app/api/gamification/achievements/__tests__/hidden-redaction.test.ts b/src/app/api/gamification/achievements/__tests__/hidden-redaction.test.ts
index 0b3a403a6..1ff461b37 100644
--- a/src/app/api/gamification/achievements/__tests__/hidden-redaction.test.ts
+++ b/src/app/api/gamification/achievements/__tests__/hidden-redaction.test.ts
@@ -38,10 +38,6 @@ vi.mock("@/lib/modules/gate", () => ({
 
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/gamification/achievements/__tests__/ios-format.test.ts b/src/app/api/gamification/achievements/__tests__/ios-format.test.ts
index 6ed08a845..c3d338474 100644
--- a/src/app/api/gamification/achievements/__tests__/ios-format.test.ts
+++ b/src/app/api/gamification/achievements/__tests__/ios-format.test.ts
@@ -38,10 +38,6 @@ vi.mock("@/lib/modules/gate", () => ({
 
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/gamification/achievements/__tests__/module-gate.test.ts b/src/app/api/gamification/achievements/__tests__/module-gate.test.ts
index 57575b470..ad48c68f6 100644
--- a/src/app/api/gamification/achievements/__tests__/module-gate.test.ts
+++ b/src/app/api/gamification/achievements/__tests__/module-gate.test.ts
@@ -36,9 +36,6 @@ vi.mock("@/lib/db", () => ({
 
 vi.mock("@/lib/auth/session", () => ({ getSession: vi.fn() }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/gamification/achievements/__tests__/writes-nothing.test.ts b/src/app/api/gamification/achievements/__tests__/writes-nothing.test.ts
index fc04778b3..4775ccf13 100644
--- a/src/app/api/gamification/achievements/__tests__/writes-nothing.test.ts
+++ b/src/app/api/gamification/achievements/__tests__/writes-nothing.test.ts
@@ -20,9 +20,6 @@ vi.mock("@/lib/db", () => ({
 
 vi.mock("@/lib/auth/session", () => ({ getSession: vi.fn() }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/illness/episodes/[id]/__tests__/body-site.test.ts b/src/app/api/illness/episodes/[id]/__tests__/body-site.test.ts
index 10698f21c..e61916a04 100644
--- a/src/app/api/illness/episodes/[id]/__tests__/body-site.test.ts
+++ b/src/app/api/illness/episodes/[id]/__tests__/body-site.test.ts
@@ -47,9 +47,6 @@ vi.mock("@/lib/idempotency", () => ({
       fn(...args),
 }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/illness/episodes/[id]/day-logs/__tests__/route.test.ts b/src/app/api/illness/episodes/[id]/day-logs/__tests__/route.test.ts
index 6c2ae4d52..017352d2b 100644
--- a/src/app/api/illness/episodes/[id]/day-logs/__tests__/route.test.ts
+++ b/src/app/api/illness/episodes/[id]/day-logs/__tests__/route.test.ts
@@ -25,9 +25,6 @@ vi.mock("@/lib/illness/gate", () => ({
   requireIllnessEnabled: vi.fn(),
 }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/illness/episodes/[id]/restore/__tests__/route.test.ts b/src/app/api/illness/episodes/[id]/restore/__tests__/route.test.ts
index b7ad8a4e7..dc180da9a 100644
--- a/src/app/api/illness/episodes/[id]/restore/__tests__/route.test.ts
+++ b/src/app/api/illness/episodes/[id]/restore/__tests__/route.test.ts
@@ -31,9 +31,6 @@ vi.mock("@/lib/idempotency", () => ({
       fn(...args),
 }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/import/apple-health-export/[jobId]/status/__tests__/route.test.ts b/src/app/api/import/apple-health-export/[jobId]/status/__tests__/route.test.ts
index b0435ae42..68b53197d 100644
--- a/src/app/api/import/apple-health-export/[jobId]/status/__tests__/route.test.ts
+++ b/src/app/api/import/apple-health-export/[jobId]/status/__tests__/route.test.ts
@@ -10,9 +10,6 @@ vi.mock("@/lib/auth/audit", () => ({
   auditLog: vi.fn().mockResolvedValue(undefined),
 }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/import/apple-health-export/__tests__/route.test.ts b/src/app/api/import/apple-health-export/__tests__/route.test.ts
index fb762f7fa..cc26e6570 100644
--- a/src/app/api/import/apple-health-export/__tests__/route.test.ts
+++ b/src/app/api/import/apple-health-export/__tests__/route.test.ts
@@ -18,9 +18,6 @@ vi.mock("@/lib/logging/signal", async (importOriginal) => ({
   ...(await importOriginal<typeof import("@/lib/logging/signal")>()),
   emitSignal: vi.fn(),
 }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/import/health-connect-export/__tests__/route.test.ts b/src/app/api/import/health-connect-export/__tests__/route.test.ts
index bba3c79b6..c55a0ba0a 100644
--- a/src/app/api/import/health-connect-export/__tests__/route.test.ts
+++ b/src/app/api/import/health-connect-export/__tests__/route.test.ts
@@ -11,9 +11,6 @@ vi.mock("@/lib/auth/audit", () => ({
   auditLog: vi.fn().mockResolvedValue(undefined),
 }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/ingest/medication/__tests__/route.test.ts b/src/app/api/ingest/medication/__tests__/route.test.ts
index 4f1f66c5b..254d84f47 100644
--- a/src/app/api/ingest/medication/__tests__/route.test.ts
+++ b/src/app/api/ingest/medication/__tests__/route.test.ts
@@ -52,9 +52,6 @@ vi.mock("@/lib/cache/invalidate", () => ({
   invalidateUserMedications: vi.fn(),
 }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/insights/biomarker-assessment/__tests__/route.test.ts b/src/app/api/insights/biomarker-assessment/__tests__/route.test.ts
index d46454899..a50e0b238 100644
--- a/src/app/api/insights/biomarker-assessment/__tests__/route.test.ts
+++ b/src/app/api/insights/biomarker-assessment/__tests__/route.test.ts
@@ -30,10 +30,6 @@ vi.mock("@/lib/auth/audit", () => ({
 
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/insights/blood-pressure-status/__tests__/route.test.ts b/src/app/api/insights/blood-pressure-status/__tests__/route.test.ts
index 6bec84c6f..d8fe900da 100644
--- a/src/app/api/insights/blood-pressure-status/__tests__/route.test.ts
+++ b/src/app/api/insights/blood-pressure-status/__tests__/route.test.ts
@@ -26,10 +26,6 @@ vi.mock("@/lib/auth/audit", () => ({
 
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/insights/cards/__tests__/route.test.ts b/src/app/api/insights/cards/__tests__/route.test.ts
index e54879a31..ad4c51001 100644
--- a/src/app/api/insights/cards/__tests__/route.test.ts
+++ b/src/app/api/insights/cards/__tests__/route.test.ts
@@ -43,10 +43,6 @@ vi.mock("@/lib/auth/audit", () => ({
 
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/insights/chat/[id]/attachments/__tests__/route.test.ts b/src/app/api/insights/chat/[id]/attachments/__tests__/route.test.ts
index a715ba6c3..00c7e8c2d 100644
--- a/src/app/api/insights/chat/[id]/attachments/__tests__/route.test.ts
+++ b/src/app/api/insights/chat/[id]/attachments/__tests__/route.test.ts
@@ -34,9 +34,6 @@ vi.mock("@/lib/ai/capabilities/gate", async () =>
     await import("@/__tests__/helpers/provider-order-mock")
   ).openCapabilityGateMock(),
 );
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/insights/chat/fenced/__tests__/route.test.ts b/src/app/api/insights/chat/fenced/__tests__/route.test.ts
index 52b4a1720..1e7656a50 100644
--- a/src/app/api/insights/chat/fenced/__tests__/route.test.ts
+++ b/src/app/api/insights/chat/fenced/__tests__/route.test.ts
@@ -45,9 +45,6 @@ vi.mock("@/lib/auth/audit", () => ({
 }));
 vi.mock("@/lib/auth/session", () => ({ getSession: vi.fn() }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/insights/coach-read/__tests__/route.test.ts b/src/app/api/insights/coach-read/__tests__/route.test.ts
index 4425cd2eb..8d20f555f 100644
--- a/src/app/api/insights/coach-read/__tests__/route.test.ts
+++ b/src/app/api/insights/coach-read/__tests__/route.test.ts
@@ -45,10 +45,6 @@ vi.mock("@/lib/rate-limit", () => ({
   checkAnalyticsReadRateLimit: vi.fn(),
 }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const localeCookie = vi.fn<() => string | undefined>(() => undefined);
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
diff --git a/src/app/api/insights/coach/facts/__tests__/route-memory.test.ts b/src/app/api/insights/coach/facts/__tests__/route-memory.test.ts
index 314c23803..9fb3ffac3 100644
--- a/src/app/api/insights/coach/facts/__tests__/route-memory.test.ts
+++ b/src/app/api/insights/coach/facts/__tests__/route-memory.test.ts
@@ -63,10 +63,6 @@ vi.mock("@/lib/logging/transports", () => ({
   emitIfSampled: vi.fn(),
 }));
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("@/lib/logging/context", async (importOriginal) => {
   const actual = await importOriginal<typeof import("@/lib/logging/context")>();
   return {
diff --git a/src/app/api/insights/coach/facts/__tests__/route.test.ts b/src/app/api/insights/coach/facts/__tests__/route.test.ts
index 4ce52362c..97591c5c0 100644
--- a/src/app/api/insights/coach/facts/__tests__/route.test.ts
+++ b/src/app/api/insights/coach/facts/__tests__/route.test.ts
@@ -59,10 +59,6 @@ vi.mock("@/lib/logging/transports", () => ({
   emitIfSampled: vi.fn(),
 }));
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("@/lib/logging/context", async (importOriginal) => {
   const actual = await importOriginal<typeof import("@/lib/logging/context")>();
   return {
diff --git a/src/app/api/insights/comprehensive/__tests__/route.test.ts b/src/app/api/insights/comprehensive/__tests__/route.test.ts
index 3454f7fc2..723cc103a 100644
--- a/src/app/api/insights/comprehensive/__tests__/route.test.ts
+++ b/src/app/api/insights/comprehensive/__tests__/route.test.ts
@@ -66,10 +66,6 @@ vi.mock("@/lib/rate-limit", () => ({
 
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/insights/correlations/__tests__/route.test.ts b/src/app/api/insights/correlations/__tests__/route.test.ts
index 37759be1d..38fd9d900 100644
--- a/src/app/api/insights/correlations/__tests__/route.test.ts
+++ b/src/app/api/insights/correlations/__tests__/route.test.ts
@@ -64,10 +64,6 @@ vi.mock("@/lib/rate-limit", () => ({
 
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("@/lib/insights/correlation-patterns", () => ({
   PATTERN_FAMILIES: {
     discoveryRetrospective: "DISCOVERY_RETROSPECTIVE",
diff --git a/src/app/api/insights/derived/__tests__/route.test.ts b/src/app/api/insights/derived/__tests__/route.test.ts
index efdb4407d..b06acdf1e 100644
--- a/src/app/api/insights/derived/__tests__/route.test.ts
+++ b/src/app/api/insights/derived/__tests__/route.test.ts
@@ -39,9 +39,6 @@ vi.mock("@/lib/rate-limit", () => ({
   }),
 }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/insights/derived/batch/__tests__/route.test.ts b/src/app/api/insights/derived/batch/__tests__/route.test.ts
index c3469b575..34a490f84 100644
--- a/src/app/api/insights/derived/batch/__tests__/route.test.ts
+++ b/src/app/api/insights/derived/batch/__tests__/route.test.ts
@@ -23,9 +23,6 @@ vi.mock("@/lib/rate-limit", () => ({
   rateLimitHeaders: () => ({}),
 }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/insights/ecg/[id]/__tests__/route.test.ts b/src/app/api/insights/ecg/[id]/__tests__/route.test.ts
index 125e93b9c..19037f656 100644
--- a/src/app/api/insights/ecg/[id]/__tests__/route.test.ts
+++ b/src/app/api/insights/ecg/[id]/__tests__/route.test.ts
@@ -32,9 +32,6 @@ vi.mock("@/lib/auth/audit", () => ({
   auditLog: vi.fn().mockResolvedValue(undefined),
 }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/insights/ecg/__tests__/route.test.ts b/src/app/api/insights/ecg/__tests__/route.test.ts
index 413465864..2b01992ae 100644
--- a/src/app/api/insights/ecg/__tests__/route.test.ts
+++ b/src/app/api/insights/ecg/__tests__/route.test.ts
@@ -30,9 +30,6 @@ vi.mock("@/lib/auth/audit", () => ({
   auditLog: vi.fn().mockResolvedValue(undefined),
 }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/insights/layout/__tests__/route.test.ts b/src/app/api/insights/layout/__tests__/route.test.ts
index 341812186..5cfd660ad 100644
--- a/src/app/api/insights/layout/__tests__/route.test.ts
+++ b/src/app/api/insights/layout/__tests__/route.test.ts
@@ -32,10 +32,6 @@ vi.mock("@/lib/logging/transports", () => ({
   emitIfSampled: vi.fn(),
 }));
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("@/lib/logging/context", async (importOriginal) => {
   const actual = await importOriginal<typeof import("@/lib/logging/context")>();
   return {
diff --git a/src/app/api/insights/metric-status/__tests__/route.test.ts b/src/app/api/insights/metric-status/__tests__/route.test.ts
index 0ed114640..fc703ea6e 100644
--- a/src/app/api/insights/metric-status/__tests__/route.test.ts
+++ b/src/app/api/insights/metric-status/__tests__/route.test.ts
@@ -32,10 +32,6 @@ vi.mock("@/lib/auth/audit", () => ({
 
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/insights/mood-status/__tests__/route.test.ts b/src/app/api/insights/mood-status/__tests__/route.test.ts
index 10c532985..5133db316 100644
--- a/src/app/api/insights/mood-status/__tests__/route.test.ts
+++ b/src/app/api/insights/mood-status/__tests__/route.test.ts
@@ -23,10 +23,6 @@ vi.mock("@/lib/auth/audit", () => ({
 
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/insights/patterns/[id]/__tests__/route.test.ts b/src/app/api/insights/patterns/[id]/__tests__/route.test.ts
index dca313586..4c1d6edb1 100644
--- a/src/app/api/insights/patterns/[id]/__tests__/route.test.ts
+++ b/src/app/api/insights/patterns/[id]/__tests__/route.test.ts
@@ -13,9 +13,6 @@ vi.mock("@/lib/auth/audit", () => ({
   auditLog: vi.fn().mockResolvedValue(undefined),
 }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("@/lib/modules/gate", async (importOriginal) => ({
   ...(await importOriginal<typeof ModuleGateModule>()),
   requireModuleEnabled: vi.fn(),
diff --git a/src/app/api/insights/patterns/__tests__/route.test.ts b/src/app/api/insights/patterns/__tests__/route.test.ts
index a1ca0dee5..d9483b169 100644
--- a/src/app/api/insights/patterns/__tests__/route.test.ts
+++ b/src/app/api/insights/patterns/__tests__/route.test.ts
@@ -8,9 +8,6 @@ vi.mock("@/lib/db", () => ({
 }));
 vi.mock("@/lib/auth/session", () => ({ getSession: vi.fn() }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("@/lib/modules/gate", async (importOriginal) => ({
   ...(await importOriginal<typeof ModuleGateModule>()),
   requireModuleEnabled: vi.fn(),
diff --git a/src/app/api/insights/pregenerate/__tests__/route.test.ts b/src/app/api/insights/pregenerate/__tests__/route.test.ts
index e85491006..570240ffe 100644
--- a/src/app/api/insights/pregenerate/__tests__/route.test.ts
+++ b/src/app/api/insights/pregenerate/__tests__/route.test.ts
@@ -19,10 +19,6 @@ vi.mock("@/lib/auth/audit", () => ({
 
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/insights/rhythm-events/__tests__/route.test.ts b/src/app/api/insights/rhythm-events/__tests__/route.test.ts
index 65f5c094e..f5b5ba143 100644
--- a/src/app/api/insights/rhythm-events/__tests__/route.test.ts
+++ b/src/app/api/insights/rhythm-events/__tests__/route.test.ts
@@ -33,9 +33,6 @@ vi.mock("@/lib/auth/audit", () => ({
   auditLog: vi.fn().mockResolvedValue(undefined),
 }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/insights/targets/__tests__/route.test.ts b/src/app/api/insights/targets/__tests__/route.test.ts
index b948897de..bfc24c417 100644
--- a/src/app/api/insights/targets/__tests__/route.test.ts
+++ b/src/app/api/insights/targets/__tests__/route.test.ts
@@ -65,10 +65,6 @@ vi.mock("@/lib/auth/audit", () => ({
   auditLog: vi.fn().mockResolvedValue(undefined),
 }));
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
 
 vi.mock("next/headers", () => ({
diff --git a/src/app/api/integrations/healthkit/__tests__/route.test.ts b/src/app/api/integrations/healthkit/__tests__/route.test.ts
index c7d7c6176..57e944359 100644
--- a/src/app/api/integrations/healthkit/__tests__/route.test.ts
+++ b/src/app/api/integrations/healthkit/__tests__/route.test.ts
@@ -30,10 +30,6 @@ vi.mock("@/lib/auth/audit", () => ({
 
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/labs/__tests__/error-contract.test.ts b/src/app/api/labs/__tests__/error-contract.test.ts
index fb2d8c4a6..ec812c84f 100644
--- a/src/app/api/labs/__tests__/error-contract.test.ts
+++ b/src/app/api/labs/__tests__/error-contract.test.ts
@@ -46,9 +46,6 @@ vi.mock("@/lib/labs/store", () => ({
   decryptNoteFromBytes: vi.fn(),
 }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/labs/ocr/commit/__tests__/route.test.ts b/src/app/api/labs/ocr/commit/__tests__/route.test.ts
index 435dd77eb..8f51cc8ae 100644
--- a/src/app/api/labs/ocr/commit/__tests__/route.test.ts
+++ b/src/app/api/labs/ocr/commit/__tests__/route.test.ts
@@ -63,9 +63,6 @@ vi.mock("@/lib/labs/serialise", () => ({
   serialiseLabResult: (created: { id: string }) => ({ id: created.id }),
 }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/labs/restore/__tests__/route.test.ts b/src/app/api/labs/restore/__tests__/route.test.ts
index 5a4e3bcaf..bba0026cf 100644
--- a/src/app/api/labs/restore/__tests__/route.test.ts
+++ b/src/app/api/labs/restore/__tests__/route.test.ts
@@ -40,9 +40,6 @@ vi.mock("@/lib/cache/invalidate", () => ({
   invalidateUserHealthScore: vi.fn(),
 }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/measurement-categories/__tests__/route.test.ts b/src/app/api/measurement-categories/__tests__/route.test.ts
index 6db396ff7..1fd11c4e2 100644
--- a/src/app/api/measurement-categories/__tests__/route.test.ts
+++ b/src/app/api/measurement-categories/__tests__/route.test.ts
@@ -9,10 +9,6 @@ vi.mock("@/lib/auth/audit", () => ({
 
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/measurements/[id]/__tests__/route.test.ts b/src/app/api/measurements/[id]/__tests__/route.test.ts
index 01b3cb23b..6ab8c132b 100644
--- a/src/app/api/measurements/[id]/__tests__/route.test.ts
+++ b/src/app/api/measurements/[id]/__tests__/route.test.ts
@@ -19,9 +19,6 @@ vi.mock("@/lib/auth/audit", () => ({
   auditLog: vi.fn().mockResolvedValue(undefined),
 }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("@/lib/cache/invalidate", () => ({
   invalidateUserMeasurements: vi.fn(),
 }));
diff --git a/src/app/api/measurements/__tests__/group-by-day.test.ts b/src/app/api/measurements/__tests__/group-by-day.test.ts
index db8f542f9..4a305dd28 100644
--- a/src/app/api/measurements/__tests__/group-by-day.test.ts
+++ b/src/app/api/measurements/__tests__/group-by-day.test.ts
@@ -48,9 +48,6 @@ vi.mock("@/lib/db", () => ({
 vi.mock("@/lib/auth/session", () => ({ getSession: vi.fn() }));
 vi.mock("@/lib/auth/audit", () => ({ auditLog: vi.fn() }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/measurements/__tests__/put-duplicate-timestamp.test.ts b/src/app/api/measurements/__tests__/put-duplicate-timestamp.test.ts
index 2424881af..6c6abdf48 100644
--- a/src/app/api/measurements/__tests__/put-duplicate-timestamp.test.ts
+++ b/src/app/api/measurements/__tests__/put-duplicate-timestamp.test.ts
@@ -16,10 +16,6 @@ vi.mock("@/lib/auth/audit", () => ({ auditLog: vi.fn() }));
 
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/measurements/__tests__/range-aggregation-route.test.ts b/src/app/api/measurements/__tests__/range-aggregation-route.test.ts
index d5f0db0d6..82360e130 100644
--- a/src/app/api/measurements/__tests__/range-aggregation-route.test.ts
+++ b/src/app/api/measurements/__tests__/range-aggregation-route.test.ts
@@ -48,9 +48,6 @@ vi.mock("@/lib/rollups/measurement-rollups", async () => {
 vi.mock("@/lib/auth/session", () => ({ getSession: vi.fn() }));
 vi.mock("@/lib/auth/audit", () => ({ auditLog: vi.fn() }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/measurements/__tests__/zod-multi-issue.test.ts b/src/app/api/measurements/__tests__/zod-multi-issue.test.ts
index 894a71648..695d56780 100644
--- a/src/app/api/measurements/__tests__/zod-multi-issue.test.ts
+++ b/src/app/api/measurements/__tests__/zod-multi-issue.test.ts
@@ -43,9 +43,6 @@ vi.mock("@/lib/db", () => ({
 vi.mock("@/lib/auth/session", () => ({ getSession: vi.fn() }));
 vi.mock("@/lib/auth/audit", () => ({ auditLog: vi.fn() }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("@/lib/idempotency", () => ({
   withIdempotency:
     <Args extends unknown[]>(fn: (...args: Args) => Promise<Response>) =>
diff --git a/src/app/api/measurements/batch/__tests__/aggregated-hr-wire.test.ts b/src/app/api/measurements/batch/__tests__/aggregated-hr-wire.test.ts
index 085fe93d4..b8e4c6d01 100644
--- a/src/app/api/measurements/batch/__tests__/aggregated-hr-wire.test.ts
+++ b/src/app/api/measurements/batch/__tests__/aggregated-hr-wire.test.ts
@@ -99,9 +99,6 @@ vi.mock("@/lib/auth/audit", () => ({
   auditLog: vi.fn().mockResolvedValue(undefined),
 }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("@/lib/rate-limit", () => ({ checkRateLimit: vi.fn() }));
 vi.mock("@/lib/jobs/pr-detection", () => ({
   enqueuePrDetection: vi.fn().mockResolvedValue(undefined),
diff --git a/src/app/api/measurements/batch/__tests__/duplicate-prefilter.test.ts b/src/app/api/measurements/batch/__tests__/duplicate-prefilter.test.ts
index af4a4a395..8f21a1f31 100644
--- a/src/app/api/measurements/batch/__tests__/duplicate-prefilter.test.ts
+++ b/src/app/api/measurements/batch/__tests__/duplicate-prefilter.test.ts
@@ -226,9 +226,6 @@ vi.mock("@/lib/auth/audit", () => ({
   auditLog: vi.fn().mockResolvedValue(undefined),
 }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("@/lib/rate-limit", () => ({ checkRateLimit: vi.fn() }));
 vi.mock("@/lib/jobs/pr-detection", () => ({
   enqueuePrDetection: vi.fn().mockResolvedValue(undefined),
diff --git a/src/app/api/measurements/batch/__tests__/hr-bucket-observability.test.ts b/src/app/api/measurements/batch/__tests__/hr-bucket-observability.test.ts
index 188687af5..8d5eb4a0e 100644
--- a/src/app/api/measurements/batch/__tests__/hr-bucket-observability.test.ts
+++ b/src/app/api/measurements/batch/__tests__/hr-bucket-observability.test.ts
@@ -106,9 +106,6 @@ vi.mock("@/lib/auth/audit", () => ({
   auditLog: vi.fn().mockResolvedValue(undefined),
 }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("@/lib/rate-limit", () => ({ checkRateLimit: vi.fn() }));
 vi.mock("@/lib/jobs/pr-detection", () => ({
   enqueuePrDetection: vi.fn().mockResolvedValue(undefined),
diff --git a/src/app/api/measurements/batch/__tests__/insert-returning-arrivals.test.ts b/src/app/api/measurements/batch/__tests__/insert-returning-arrivals.test.ts
index e7eb79f74..539305fb0 100644
--- a/src/app/api/measurements/batch/__tests__/insert-returning-arrivals.test.ts
+++ b/src/app/api/measurements/batch/__tests__/insert-returning-arrivals.test.ts
@@ -77,9 +77,6 @@ vi.mock("@/lib/auth/audit", () => ({
   auditLog: vi.fn().mockResolvedValue(undefined),
 }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("@/lib/rate-limit", () => ({ checkRateLimit: vi.fn() }));
 vi.mock("@/lib/jobs/pr-detection", () => ({
   enqueuePrDetection: vi.fn().mockResolvedValue(undefined),
diff --git a/src/app/api/measurements/batch/__tests__/issue-paths.test.ts b/src/app/api/measurements/batch/__tests__/issue-paths.test.ts
index 8d7edf6c0..4b864ee89 100644
--- a/src/app/api/measurements/batch/__tests__/issue-paths.test.ts
+++ b/src/app/api/measurements/batch/__tests__/issue-paths.test.ts
@@ -38,9 +38,6 @@ vi.mock("@/lib/auth/audit", () => ({
   auditLog: vi.fn().mockResolvedValue(undefined),
 }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("@/lib/rate-limit", () => ({ checkRateLimit: vi.fn() }));
 vi.mock("@/lib/jobs/pr-detection", () => ({
   enqueuePrDetection: vi.fn().mockResolvedValue(undefined),
diff --git a/src/app/api/measurements/batch/__tests__/pr-detection-hook.test.ts b/src/app/api/measurements/batch/__tests__/pr-detection-hook.test.ts
index e7c8f58f2..f29879bc8 100644
--- a/src/app/api/measurements/batch/__tests__/pr-detection-hook.test.ts
+++ b/src/app/api/measurements/batch/__tests__/pr-detection-hook.test.ts
@@ -58,10 +58,6 @@ vi.mock("@/lib/auth/audit", () => ({
 
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("@/lib/rate-limit", () => ({
   checkRateLimit: vi.fn(),
 }));
diff --git a/src/app/api/measurements/batch/__tests__/refusal-detail.test.ts b/src/app/api/measurements/batch/__tests__/refusal-detail.test.ts
index 921cda502..34a571f02 100644
--- a/src/app/api/measurements/batch/__tests__/refusal-detail.test.ts
+++ b/src/app/api/measurements/batch/__tests__/refusal-detail.test.ts
@@ -45,9 +45,6 @@ vi.mock("@/lib/auth/audit", () => ({
   auditLog: vi.fn().mockResolvedValue(undefined),
 }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("@/lib/rate-limit", () => ({ checkRateLimit: vi.fn() }));
 vi.mock("@/lib/jobs/pr-detection", () => ({
   enqueuePrDetection: vi.fn().mockResolvedValue(undefined),
diff --git a/src/app/api/measurements/batch/__tests__/sync-trigger.test.ts b/src/app/api/measurements/batch/__tests__/sync-trigger.test.ts
index 38f2318fb..b73a963fa 100644
--- a/src/app/api/measurements/batch/__tests__/sync-trigger.test.ts
+++ b/src/app/api/measurements/batch/__tests__/sync-trigger.test.ts
@@ -108,9 +108,6 @@ vi.mock("@/lib/auth/audit", () => ({
   auditLog: vi.fn().mockResolvedValue(undefined),
 }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("@/lib/rate-limit", () => ({ checkRateLimit: vi.fn() }));
 vi.mock("@/lib/jobs/pr-detection", () => ({
   enqueuePrDetection: vi.fn().mockResolvedValue(undefined),
diff --git a/src/app/api/measurements/batch/__tests__/timestamp-plausibility.test.ts b/src/app/api/measurements/batch/__tests__/timestamp-plausibility.test.ts
index 8fdeb46da..b9a2ec68b 100644
--- a/src/app/api/measurements/batch/__tests__/timestamp-plausibility.test.ts
+++ b/src/app/api/measurements/batch/__tests__/timestamp-plausibility.test.ts
@@ -48,10 +48,6 @@ vi.mock("@/lib/auth/audit", () => ({
 
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("@/lib/rate-limit", () => ({
   checkRateLimit: vi.fn(),
 }));
diff --git a/src/app/api/measurements/batch/__tests__/unstable-external-id.test.ts b/src/app/api/measurements/batch/__tests__/unstable-external-id.test.ts
index a68fdd012..c03197a76 100644
--- a/src/app/api/measurements/batch/__tests__/unstable-external-id.test.ts
+++ b/src/app/api/measurements/batch/__tests__/unstable-external-id.test.ts
@@ -46,10 +46,6 @@ vi.mock("@/lib/auth/audit", () => ({
 
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("@/lib/rate-limit", () => ({
   checkRateLimit: vi.fn(),
 }));
diff --git a/src/app/api/measurements/bulk-delete/__tests__/route.test.ts b/src/app/api/measurements/bulk-delete/__tests__/route.test.ts
index f546f195d..55f4cb17c 100644
--- a/src/app/api/measurements/bulk-delete/__tests__/route.test.ts
+++ b/src/app/api/measurements/bulk-delete/__tests__/route.test.ts
@@ -68,9 +68,6 @@ vi.mock("@/lib/rollups/measurement-rollups", async () => {
   };
 });
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/measurements/by-external-ids/__tests__/route.test.ts b/src/app/api/measurements/by-external-ids/__tests__/route.test.ts
index 5cfee6105..58729c791 100644
--- a/src/app/api/measurements/by-external-ids/__tests__/route.test.ts
+++ b/src/app/api/measurements/by-external-ids/__tests__/route.test.ts
@@ -45,9 +45,6 @@ vi.mock("@/lib/rollups/measurement-rollups", async () => {
   };
 });
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/measurements/restore/__tests__/route.test.ts b/src/app/api/measurements/restore/__tests__/route.test.ts
index 73ce2540e..6678f068c 100644
--- a/src/app/api/measurements/restore/__tests__/route.test.ts
+++ b/src/app/api/measurements/restore/__tests__/route.test.ts
@@ -68,9 +68,6 @@ vi.mock("@/lib/rollups/measurement-rollups", async () => {
   };
 });
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/measurements/series-batch/__tests__/route.test.ts b/src/app/api/measurements/series-batch/__tests__/route.test.ts
index 9e34cea5d..d0184557e 100644
--- a/src/app/api/measurements/series-batch/__tests__/route.test.ts
+++ b/src/app/api/measurements/series-batch/__tests__/route.test.ts
@@ -15,9 +15,6 @@ import { describe, it, expect, vi, beforeEach } from "vitest";
 import { NextRequest } from "next/server";
 
 vi.mock("@/lib/auth/session", () => ({ getSession: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
 vi.mock("@/lib/logging/context", async (importOriginal) => {
   const actual = await importOriginal<typeof import("@/lib/logging/context")>();
diff --git a/src/app/api/measurements/series/__tests__/route.test.ts b/src/app/api/measurements/series/__tests__/route.test.ts
index ea63202db..2b529b188 100644
--- a/src/app/api/measurements/series/__tests__/route.test.ts
+++ b/src/app/api/measurements/series/__tests__/route.test.ts
@@ -84,10 +84,6 @@ vi.mock("@/lib/rollups/measurement-read", () => ({
   loadUserSourcePriority: vi.fn(async () => null),
 }));
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("@/lib/logging/context", async (importOriginal) => {
   const actual = await importOriginal<typeof import("@/lib/logging/context")>();
   return {
diff --git a/src/app/api/measurements/series/__tests__/unknown-query-param-open.test.ts b/src/app/api/measurements/series/__tests__/unknown-query-param-open.test.ts
index b852744ff..701429dfe 100644
--- a/src/app/api/measurements/series/__tests__/unknown-query-param-open.test.ts
+++ b/src/app/api/measurements/series/__tests__/unknown-query-param-open.test.ts
@@ -39,10 +39,6 @@ vi.mock("@/lib/rollups/measurement-read", () => ({
   loadUserSourcePriority: vi.fn(async () => null),
 }));
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("@/lib/logging/context", async (importOriginal) => {
   const actual = await importOriginal<typeof import("@/lib/logging/context")>();
   return { ...actual, annotate: vi.fn() };
diff --git a/src/app/api/medications/[id]/__tests__/route.test.ts b/src/app/api/medications/[id]/__tests__/route.test.ts
index 39b43f603..f78763616 100644
--- a/src/app/api/medications/[id]/__tests__/route.test.ts
+++ b/src/app/api/medications/[id]/__tests__/route.test.ts
@@ -104,9 +104,6 @@ vi.mock("@/lib/medication-category", () => ({
   setMedicationCategory: vi.fn().mockResolvedValue("OTHER"),
 }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/medications/[id]/compliance/__tests__/route.test.ts b/src/app/api/medications/[id]/compliance/__tests__/route.test.ts
index 7e39647d6..b5c3258a3 100644
--- a/src/app/api/medications/[id]/compliance/__tests__/route.test.ts
+++ b/src/app/api/medications/[id]/compliance/__tests__/route.test.ts
@@ -54,10 +54,6 @@ vi.mock("@/lib/rate-limit", () => ({
 
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/medications/[id]/dose-history/__tests__/route.test.ts b/src/app/api/medications/[id]/dose-history/__tests__/route.test.ts
index fe998e2a6..5c55e140a 100644
--- a/src/app/api/medications/[id]/dose-history/__tests__/route.test.ts
+++ b/src/app/api/medications/[id]/dose-history/__tests__/route.test.ts
@@ -42,9 +42,6 @@ vi.mock("@/lib/auth/audit", () => ({
   auditLog: vi.fn().mockResolvedValue(undefined),
 }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/medications/[id]/glp1/__tests__/route.test.ts b/src/app/api/medications/[id]/glp1/__tests__/route.test.ts
index 2b28fec55..156492bfc 100644
--- a/src/app/api/medications/[id]/glp1/__tests__/route.test.ts
+++ b/src/app/api/medications/[id]/glp1/__tests__/route.test.ts
@@ -47,10 +47,6 @@ vi.mock("@/lib/rate-limit", () => ({
 
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/medications/[id]/intake/[eventId]/__tests__/route.test.ts b/src/app/api/medications/[id]/intake/[eventId]/__tests__/route.test.ts
index cedb34685..2f4eb9b7a 100644
--- a/src/app/api/medications/[id]/intake/[eventId]/__tests__/route.test.ts
+++ b/src/app/api/medications/[id]/intake/[eventId]/__tests__/route.test.ts
@@ -41,9 +41,6 @@ vi.mock("@/lib/medications/dose-day-refresh", () => ({
   refreshDoseSlot: vi.fn().mockResolvedValue(undefined),
 }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/medications/[id]/intake/__tests__/route.test.ts b/src/app/api/medications/[id]/intake/__tests__/route.test.ts
index 42b3eaf50..e5bfe0558 100644
--- a/src/app/api/medications/[id]/intake/__tests__/route.test.ts
+++ b/src/app/api/medications/[id]/intake/__tests__/route.test.ts
@@ -88,10 +88,6 @@ vi.mock("@/lib/auth/audit", () => ({ auditLog: vi.fn() }));
 
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/medications/[id]/intake/__tests__/source-provenance.test.ts b/src/app/api/medications/[id]/intake/__tests__/source-provenance.test.ts
index 759d6ff64..2a24675ad 100644
--- a/src/app/api/medications/[id]/intake/__tests__/source-provenance.test.ts
+++ b/src/app/api/medications/[id]/intake/__tests__/source-provenance.test.ts
@@ -109,10 +109,6 @@ vi.mock("@/lib/auth/audit", () => ({
   auditLog: vi.fn().mockResolvedValue(undefined),
 }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 // Default to no Authorization header; the Bearer tests override this.
 const headerStore = { authorization: null as string | null };
 vi.mock("next/headers", () => ({
diff --git a/src/app/api/medications/[id]/intake/import/__tests__/route.test.ts b/src/app/api/medications/[id]/intake/import/__tests__/route.test.ts
index e04be16be..933854051 100644
--- a/src/app/api/medications/[id]/intake/import/__tests__/route.test.ts
+++ b/src/app/api/medications/[id]/intake/import/__tests__/route.test.ts
@@ -45,9 +45,6 @@ vi.mock("@/lib/jobs/boss-instance", () => ({
   getGlobalBoss: vi.fn(),
 }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/medications/[id]/schedule-revisions/__tests__/route.test.ts b/src/app/api/medications/[id]/schedule-revisions/__tests__/route.test.ts
index a54c4b903..9cffd05d0 100644
--- a/src/app/api/medications/[id]/schedule-revisions/__tests__/route.test.ts
+++ b/src/app/api/medications/[id]/schedule-revisions/__tests__/route.test.ts
@@ -43,9 +43,6 @@ vi.mock("@/lib/auth/audit", () => ({
   auditLog: vi.fn().mockResolvedValue(undefined),
 }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/medications/__tests__/route.test.ts b/src/app/api/medications/__tests__/route.test.ts
index 1159f63a2..b8a7c5527 100644
--- a/src/app/api/medications/__tests__/route.test.ts
+++ b/src/app/api/medications/__tests__/route.test.ts
@@ -107,9 +107,6 @@ vi.mock("@/lib/tz/local-day", async (importOriginal) => ({
     .mockReturnValue({ start: new Date(), end: new Date() }),
 }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/medications/compliance/__tests__/route.test.ts b/src/app/api/medications/compliance/__tests__/route.test.ts
index 1f7059142..15e0a3e90 100644
--- a/src/app/api/medications/compliance/__tests__/route.test.ts
+++ b/src/app/api/medications/compliance/__tests__/route.test.ts
@@ -38,10 +38,6 @@ vi.mock("@/lib/rate-limit", () => ({
 
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/medications/intake/__tests__/route.test.ts b/src/app/api/medications/intake/__tests__/route.test.ts
index 87d35347f..3b0cf8ce1 100644
--- a/src/app/api/medications/intake/__tests__/route.test.ts
+++ b/src/app/api/medications/intake/__tests__/route.test.ts
@@ -65,10 +65,6 @@ vi.mock("@/lib/notifications/medication-intake-sync", () => ({
 
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/medications/intake/bulk/__tests__/dose-arrival-scope.test.ts b/src/app/api/medications/intake/bulk/__tests__/dose-arrival-scope.test.ts
index 18232033f..d0c59a771 100644
--- a/src/app/api/medications/intake/bulk/__tests__/dose-arrival-scope.test.ts
+++ b/src/app/api/medications/intake/bulk/__tests__/dose-arrival-scope.test.ts
@@ -54,9 +54,6 @@ vi.mock("@/lib/notifications/medication-intake-sync", () => ({
   queueMedicationIntakeSync: vi.fn(),
 }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/medications/intake/bulk/__tests__/route.test.ts b/src/app/api/medications/intake/bulk/__tests__/route.test.ts
index 006d9c7ee..ff800ad0d 100644
--- a/src/app/api/medications/intake/bulk/__tests__/route.test.ts
+++ b/src/app/api/medications/intake/bulk/__tests__/route.test.ts
@@ -56,9 +56,6 @@ vi.mock("@/lib/medications/dose-day-refresh", () => ({
   dayKeyForScheduledFor: vi.fn().mockReturnValue("2026-01-01"),
 }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/medications/intake/dose-history-import/__tests__/route.test.ts b/src/app/api/medications/intake/dose-history-import/__tests__/route.test.ts
index 491f52dd5..39b3c6b1b 100644
--- a/src/app/api/medications/intake/dose-history-import/__tests__/route.test.ts
+++ b/src/app/api/medications/intake/dose-history-import/__tests__/route.test.ts
@@ -40,9 +40,6 @@ vi.mock("@/lib/auth/audit", () => ({
 vi.mock("@/lib/rate-limit", () => ({ checkRateLimit: vi.fn() }));
 vi.mock("@/lib/jobs/boss-instance", () => ({ getGlobalBoss: vi.fn() }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/medications/layout/__tests__/route.test.ts b/src/app/api/medications/layout/__tests__/route.test.ts
index cc8f500b6..3d7e94637 100644
--- a/src/app/api/medications/layout/__tests__/route.test.ts
+++ b/src/app/api/medications/layout/__tests__/route.test.ts
@@ -32,10 +32,6 @@ vi.mock("@/lib/logging/transports", () => ({
   emitIfSampled: vi.fn(),
 }));
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/mental-health/assessments/[id]/__tests__/route.test.ts b/src/app/api/mental-health/assessments/[id]/__tests__/route.test.ts
index be19cee4b..c1fa7bdde 100644
--- a/src/app/api/mental-health/assessments/[id]/__tests__/route.test.ts
+++ b/src/app/api/mental-health/assessments/[id]/__tests__/route.test.ts
@@ -34,9 +34,6 @@ vi.mock("@/lib/ai/coach/bytes-codec", () => ({
 
 vi.mock("@/lib/auth/session", () => ({ getSession: vi.fn() }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/mental-health/assessments/__tests__/route.test.ts b/src/app/api/mental-health/assessments/__tests__/route.test.ts
index 3dfa8ded0..bc4e01570 100644
--- a/src/app/api/mental-health/assessments/__tests__/route.test.ts
+++ b/src/app/api/mental-health/assessments/__tests__/route.test.ts
@@ -52,9 +52,6 @@ vi.mock("@/lib/auth/audit", () => ({
   auditLog: vi.fn().mockResolvedValue(undefined),
 }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/meta/capabilities/__tests__/route.test.ts b/src/app/api/meta/capabilities/__tests__/route.test.ts
index 1a068b6d0..c82648f28 100644
--- a/src/app/api/meta/capabilities/__tests__/route.test.ts
+++ b/src/app/api/meta/capabilities/__tests__/route.test.ts
@@ -29,10 +29,6 @@ vi.mock("@/lib/auth/audit", () => ({
 
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/mood-entries/[id]/__tests__/route.test.ts b/src/app/api/mood-entries/[id]/__tests__/route.test.ts
index 19727e41f..0d0055689 100644
--- a/src/app/api/mood-entries/[id]/__tests__/route.test.ts
+++ b/src/app/api/mood-entries/[id]/__tests__/route.test.ts
@@ -56,9 +56,6 @@ vi.mock("@/lib/rollups/mood-rollups", () => ({
   recomputeMoodBucketsForEntry: vi.fn().mockResolvedValue(undefined),
 }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/mood-entries/__tests__/route.test.ts b/src/app/api/mood-entries/__tests__/route.test.ts
index db99a0445..d13157028 100644
--- a/src/app/api/mood-entries/__tests__/route.test.ts
+++ b/src/app/api/mood-entries/__tests__/route.test.ts
@@ -88,9 +88,6 @@ vi.mock("@/lib/rollups/mood-rollups", () => ({
   recomputeMoodBucketsForEntry: vi.fn().mockResolvedValue(undefined),
 }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/mood-entries/bulk-delete/__tests__/route.test.ts b/src/app/api/mood-entries/bulk-delete/__tests__/route.test.ts
index f90b842bc..e78b9e4f3 100644
--- a/src/app/api/mood-entries/bulk-delete/__tests__/route.test.ts
+++ b/src/app/api/mood-entries/bulk-delete/__tests__/route.test.ts
@@ -40,9 +40,6 @@ vi.mock("@/lib/rollups/mood-rollups", () => ({
   recomputeMoodBucketsForEntry: vi.fn().mockResolvedValue(undefined),
 }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/mood-entries/bulk/__tests__/route.test.ts b/src/app/api/mood-entries/bulk/__tests__/route.test.ts
index e77da8c5b..a4f9f0628 100644
--- a/src/app/api/mood-entries/bulk/__tests__/route.test.ts
+++ b/src/app/api/mood-entries/bulk/__tests__/route.test.ts
@@ -83,9 +83,6 @@ vi.mock("@/lib/rollups/mood-rollups", () => ({
   recomputeMoodBucketsForEntry: vi.fn().mockResolvedValue(undefined),
 }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/mood-entries/restore/__tests__/route.test.ts b/src/app/api/mood-entries/restore/__tests__/route.test.ts
index 7ff413f63..d015a817d 100644
--- a/src/app/api/mood-entries/restore/__tests__/route.test.ts
+++ b/src/app/api/mood-entries/restore/__tests__/route.test.ts
@@ -41,9 +41,6 @@ vi.mock("@/lib/rollups/mood-rollups", () => ({
   recomputeMoodBucketsForEntry: vi.fn().mockResolvedValue(undefined),
 }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/mood/analytics/__tests__/route.test.ts b/src/app/api/mood/analytics/__tests__/route.test.ts
index 9e538462f..dfcefc9e7 100644
--- a/src/app/api/mood/analytics/__tests__/route.test.ts
+++ b/src/app/api/mood/analytics/__tests__/route.test.ts
@@ -43,10 +43,6 @@ vi.mock("@/lib/modules/gate", () => ({
   requireModuleEnabled: vi.fn(async () => ({ enabled: true })),
 }));
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/mood/insights/__tests__/route.test.ts b/src/app/api/mood/insights/__tests__/route.test.ts
index a00ef9dbf..deea12a50 100644
--- a/src/app/api/mood/insights/__tests__/route.test.ts
+++ b/src/app/api/mood/insights/__tests__/route.test.ts
@@ -15,9 +15,6 @@ vi.mock("@/lib/cache/server-cache", () => ({
   caches: { moodInsights: {} },
 }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/notifications/action/[token]/__tests__/route.test.ts b/src/app/api/notifications/action/[token]/__tests__/route.test.ts
index 54f10d451..3de1caaba 100644
--- a/src/app/api/notifications/action/[token]/__tests__/route.test.ts
+++ b/src/app/api/notifications/action/[token]/__tests__/route.test.ts
@@ -27,10 +27,6 @@ vi.mock("@/lib/mood/create-from-telegram", () => ({
   logTelegramMood: vi.fn(),
 }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 import { POST } from "../route";
 import { prisma } from "@/lib/db";
 import { checkAuthSurfaceRateLimit, checkRateLimit } from "@/lib/rate-limit";
diff --git a/src/app/api/notifications/status/__tests__/route.test.ts b/src/app/api/notifications/status/__tests__/route.test.ts
index dac4be431..28f01b7bb 100644
--- a/src/app/api/notifications/status/__tests__/route.test.ts
+++ b/src/app/api/notifications/status/__tests__/route.test.ts
@@ -38,10 +38,6 @@ vi.mock("@/lib/auth/audit", () => ({
 
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/nutrients/__tests__/route.test.ts b/src/app/api/nutrients/__tests__/route.test.ts
index 8f2d5100c..0315b747a 100644
--- a/src/app/api/nutrients/__tests__/route.test.ts
+++ b/src/app/api/nutrients/__tests__/route.test.ts
@@ -23,9 +23,6 @@ vi.mock("@/lib/modules/gate", () => ({
 
 vi.mock("@/lib/auth/session", () => ({ getSession: vi.fn() }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/nutrients/batch/__tests__/route.test.ts b/src/app/api/nutrients/batch/__tests__/route.test.ts
index cc6ea246a..63079a20b 100644
--- a/src/app/api/nutrients/batch/__tests__/route.test.ts
+++ b/src/app/api/nutrients/batch/__tests__/route.test.ts
@@ -49,9 +49,6 @@ vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
 vi.mock("@/lib/cache/invalidate", () => ({
   invalidateUserDashboardSnapshot: vi.fn(),
 }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/nutrients/daily/__tests__/route.test.ts b/src/app/api/nutrients/daily/__tests__/route.test.ts
index af942a685..2c326657f 100644
--- a/src/app/api/nutrients/daily/__tests__/route.test.ts
+++ b/src/app/api/nutrients/daily/__tests__/route.test.ts
@@ -23,9 +23,6 @@ vi.mock("@/lib/modules/gate", () => ({
 
 vi.mock("@/lib/auth/session", () => ({ getSession: vi.fn() }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/nutrients/water/__tests__/route.test.ts b/src/app/api/nutrients/water/__tests__/route.test.ts
index 354ce7cc2..b1ad8c701 100644
--- a/src/app/api/nutrients/water/__tests__/route.test.ts
+++ b/src/app/api/nutrients/water/__tests__/route.test.ts
@@ -44,9 +44,6 @@ vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
 vi.mock("@/lib/auth/audit", () => ({
   auditLog: vi.fn().mockResolvedValue(undefined),
 }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/onboarding/__tests__/error-contract.test.ts b/src/app/api/onboarding/__tests__/error-contract.test.ts
index 4bbffc9b2..a219fe909 100644
--- a/src/app/api/onboarding/__tests__/error-contract.test.ts
+++ b/src/app/api/onboarding/__tests__/error-contract.test.ts
@@ -9,9 +9,6 @@ vi.mock("@/lib/auth/session", () => ({
   setOnboardingPendingCookie: vi.fn(),
 }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/onboarding/complete/__tests__/route.test.ts b/src/app/api/onboarding/complete/__tests__/route.test.ts
index 4fbc8c9a8..c33b8a690 100644
--- a/src/app/api/onboarding/complete/__tests__/route.test.ts
+++ b/src/app/api/onboarding/complete/__tests__/route.test.ts
@@ -28,10 +28,6 @@ vi.mock("@/lib/auth/session", async (importOriginal) => {
 
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("@/lib/logging/context", async (importOriginal) => {
   const actual = await importOriginal<typeof import("@/lib/logging/context")>();
   return { ...actual, annotate: vi.fn() };
diff --git a/src/app/api/personal-records/__tests__/route.test.ts b/src/app/api/personal-records/__tests__/route.test.ts
index 2593e518d..e02a60ecb 100644
--- a/src/app/api/personal-records/__tests__/route.test.ts
+++ b/src/app/api/personal-records/__tests__/route.test.ts
@@ -19,10 +19,6 @@ vi.mock("@/lib/auth/audit", () => ({
 
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/share-links/__tests__/route.test.ts b/src/app/api/share-links/__tests__/route.test.ts
index bc5e3ad24..2373645a9 100644
--- a/src/app/api/share-links/__tests__/route.test.ts
+++ b/src/app/api/share-links/__tests__/route.test.ts
@@ -38,9 +38,6 @@ vi.mock("@/lib/auth/hmac", () => ({ hashToken: (s: string) => `hash(${s})` }));
 vi.mock("@/lib/auth/audit", () => ({ auditLog: vi.fn() }));
 vi.mock("@/lib/rate-limit", () => ({ checkRateLimit: vi.fn() }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/sleep/night/__tests__/route.test.ts b/src/app/api/sleep/night/__tests__/route.test.ts
index 483f888ee..fb957b139 100644
--- a/src/app/api/sleep/night/__tests__/route.test.ts
+++ b/src/app/api/sleep/night/__tests__/route.test.ts
@@ -39,10 +39,6 @@ vi.mock("@/lib/measurements/list/sleep-nights", async (importOriginal) => {
   return { ...actual, latestMainSleepNight: vi.fn(async () => null) };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("@/lib/logging/context", async (importOriginal) => {
   const actual = await importOriginal<typeof import("@/lib/logging/context")>();
   return { ...actual, annotate: vi.fn() };
diff --git a/src/app/api/sleep/rhythm/__tests__/route.test.ts b/src/app/api/sleep/rhythm/__tests__/route.test.ts
index f8e3ee7b5..c712c5d6e 100644
--- a/src/app/api/sleep/rhythm/__tests__/route.test.ts
+++ b/src/app/api/sleep/rhythm/__tests__/route.test.ts
@@ -28,10 +28,6 @@ vi.mock("@/lib/modules/gate", () => ({
   requireModuleEnabled: vi.fn(async () => ({ enabled: true })),
 }));
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("@/lib/logging/context", async (importOriginal) => {
   const actual = await importOriginal<typeof import("@/lib/logging/context")>();
   return { ...actual, annotate: vi.fn() };
diff --git a/src/app/api/sync/changes/__tests__/module-gate.test.ts b/src/app/api/sync/changes/__tests__/module-gate.test.ts
index 9640f30c1..a6cc395ac 100644
--- a/src/app/api/sync/changes/__tests__/module-gate.test.ts
+++ b/src/app/api/sync/changes/__tests__/module-gate.test.ts
@@ -15,9 +15,6 @@ import { NextRequest } from "next/server";
 vi.mock("@/lib/auth/session", () => ({ getSession: vi.fn() }));
 vi.mock("@/lib/rate-limit", () => ({ checkRateLimit: vi.fn() }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("@/lib/modules/gate", () => ({ isModuleEnabled: vi.fn() }));
 vi.mock("@/lib/db", () => ({
   prisma: {
diff --git a/src/app/api/user/avatar/[id]/__tests__/route.test.ts b/src/app/api/user/avatar/[id]/__tests__/route.test.ts
index 0cb2596a0..7b71d3ed2 100644
--- a/src/app/api/user/avatar/[id]/__tests__/route.test.ts
+++ b/src/app/api/user/avatar/[id]/__tests__/route.test.ts
@@ -16,10 +16,6 @@ vi.mock("@/lib/auth/audit", () => ({
 
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/user/avatar/__tests__/route.test.ts b/src/app/api/user/avatar/__tests__/route.test.ts
index 72e005dce..042086f44 100644
--- a/src/app/api/user/avatar/__tests__/route.test.ts
+++ b/src/app/api/user/avatar/__tests__/route.test.ts
@@ -17,10 +17,6 @@ vi.mock("@/lib/auth/audit", () => ({
 
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("@/lib/rate-limit", () => ({
   checkRateLimit: vi.fn().mockResolvedValue({
     allowed: true,
diff --git a/src/app/api/user/profile/__tests__/route.test.ts b/src/app/api/user/profile/__tests__/route.test.ts
index 03567bd91..511b6f3e5 100644
--- a/src/app/api/user/profile/__tests__/route.test.ts
+++ b/src/app/api/user/profile/__tests__/route.test.ts
@@ -16,10 +16,6 @@ vi.mock("@/lib/auth/audit", () => ({
 
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 // v1.18.0 — the GET alias resolves the module map. Stub it so these
 // tests assert the projection wiring without standing up the gate's
 // own DB round-trips (operator availability + assistant flags + cycle).
diff --git a/src/app/api/user/thresholds/__tests__/route.test.ts b/src/app/api/user/thresholds/__tests__/route.test.ts
index 573d737d2..c7865e32f 100644
--- a/src/app/api/user/thresholds/__tests__/route.test.ts
+++ b/src/app/api/user/thresholds/__tests__/route.test.ts
@@ -35,9 +35,6 @@ vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
 vi.mock("@/lib/cache/invalidate", () => ({
   invalidateUserProfile: vi.fn(),
 }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/withings/credentials/__tests__/route.test.ts b/src/app/api/withings/credentials/__tests__/route.test.ts
index 737ce1a9f..09f30b1e5 100644
--- a/src/app/api/withings/credentials/__tests__/route.test.ts
+++ b/src/app/api/withings/credentials/__tests__/route.test.ts
@@ -28,9 +28,6 @@ vi.mock("@/lib/integrations/status", () => ({
   markDisconnected: vi.fn().mockResolvedValue(undefined),
 }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/app/api/workouts/__tests__/batch-create.test.ts b/src/app/api/workouts/__tests__/batch-create.test.ts
index 877dee0cc..34af4f9cd 100644
--- a/src/app/api/workouts/__tests__/batch-create.test.ts
+++ b/src/app/api/workouts/__tests__/batch-create.test.ts
@@ -48,10 +48,6 @@ vi.mock("@/lib/auth/audit", () => ({
 
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("@/lib/rate-limit", () => ({
   checkRateLimit: vi.fn(),
 }));
diff --git a/src/app/api/workouts/batch/__tests__/unstable-external-id.test.ts b/src/app/api/workouts/batch/__tests__/unstable-external-id.test.ts
index 1e2cd9cd1..64dc293c3 100644
--- a/src/app/api/workouts/batch/__tests__/unstable-external-id.test.ts
+++ b/src/app/api/workouts/batch/__tests__/unstable-external-id.test.ts
@@ -55,9 +55,6 @@ vi.mock("@/lib/arrivals/emit-shared", () => ({
   emitDataArrival: vi.fn().mockResolvedValue(undefined),
 }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("@/lib/logging/context", async (importOriginal) => {
   const actual = await importOriginal<Record<string, unknown>>();
   return { ...actual, annotate: vi.fn() };
diff --git a/src/app/c/[token]/d/[id]/__tests__/route.test.ts b/src/app/c/[token]/d/[id]/__tests__/route.test.ts
index b22022580..0018989ba 100644
--- a/src/app/c/[token]/d/[id]/__tests__/route.test.ts
+++ b/src/app/c/[token]/d/[id]/__tests__/route.test.ts
@@ -52,9 +52,6 @@ vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
 vi.mock("@/lib/modules/gate", () => ({
   isModuleEnabled: vi.fn(async () => true),
 }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("next/headers", () => ({
   headers: vi.fn(async () => ({ get: () => null })),
   cookies: vi.fn(async () => ({
diff --git a/src/lib/__tests__/glitchtip-path-secret-redaction.test.ts b/src/lib/__tests__/glitchtip-path-secret-redaction.test.ts
index b24d2dba1..a2a1f295a 100644
--- a/src/lib/__tests__/glitchtip-path-secret-redaction.test.ts
+++ b/src/lib/__tests__/glitchtip-path-secret-redaction.test.ts
@@ -27,10 +27,6 @@ vi.mock("@/lib/auth/audit", () => ({
   auditLog: vi.fn().mockResolvedValue(undefined),
 }));
 vi.mock("@/lib/logging/transports", () => ({ emitIfSampled: vi.fn() }));
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("@/lib/monitoring-settings", () => ({
   getGlitchtipSettings: vi.fn(async () => ({
     glitchtipEnabled: true,
diff --git a/src/lib/analytics/__tests__/sleep-stage-composition.test.ts b/src/lib/analytics/__tests__/sleep-stage-composition.test.ts
index bb6db6fb2..520aa239b 100644
--- a/src/lib/analytics/__tests__/sleep-stage-composition.test.ts
+++ b/src/lib/analytics/__tests__/sleep-stage-composition.test.ts
@@ -28,10 +28,6 @@ vi.mock("@/lib/modules/gate", () => ({
   requireModuleEnabled: vi.fn(async () => ({ enabled: true })),
 }));
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("@/lib/logging/context", async (importOriginal) => {
   const actual = await importOriginal<typeof import("@/lib/logging/context")>();
   return { ...actual, annotate: vi.fn() };
diff --git a/src/lib/auth/__tests__/session-locale-reconcile.test.ts b/src/lib/auth/__tests__/session-locale-reconcile.test.ts
index 01b356880..7836216cd 100644
--- a/src/lib/auth/__tests__/session-locale-reconcile.test.ts
+++ b/src/lib/auth/__tests__/session-locale-reconcile.test.ts
@@ -37,10 +37,6 @@ vi.mock("@/lib/db", () => ({
   },
 }));
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("@/lib/logging/context", () => ({ getEvent: () => undefined }));
 
 vi.mock("@/lib/auth/hmac", () => ({
diff --git a/src/lib/auth/__tests__/session.test.ts b/src/lib/auth/__tests__/session.test.ts
index ecf516f9a..1384dcb54 100644
--- a/src/lib/auth/__tests__/session.test.ts
+++ b/src/lib/auth/__tests__/session.test.ts
@@ -57,10 +57,6 @@ vi.mock("@/lib/db", () => ({
   },
 }));
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("@/lib/logging/context", () => ({
   getEvent: () => undefined,
 }));
diff --git a/src/lib/auth/session.ts b/src/lib/auth/session.ts
index 3350c5ea8..4c8188a44 100644
--- a/src/lib/auth/session.ts
+++ b/src/lib/auth/session.ts
@@ -3,7 +3,6 @@ import { prisma } from "@/lib/db";
 import { cookies } from "next/headers";
 import { hashToken } from "@/lib/auth/hmac";
 import { SESSION_USER_SELECT, type SessionUser } from "@/lib/auth/session-user";
-import { ensureDbCompatibility } from "@/lib/db-compat";
 import { getEvent } from "@/lib/logging/context";
 import { shouldEmitSecureCookie } from "@/lib/auth/secure-cookie";
 import { isInputRefusal, isP2025 } from "@/lib/prisma-errors";
@@ -311,16 +310,6 @@ export async function getSession(): Promise<{
   };
   user: SessionUser;
 } | null> {
-  try {
-    await ensureDbCompatibility();
-  } catch (error) {
-    getEvent()?.setError(
-      error instanceof Error
-        ? error
-        : new Error("DB compatibility check failed"),
-    );
-  }
-
   const cookieStore = await cookies();
   const carried = readSessionCookie(cookieStore);
   if (!carried) return null;
@@ -490,7 +479,7 @@ export async function getSession(): Promise<{
 /**
  * Lightweight read of the signed-in user's persisted locale for the root
  * layout's first-paint language resolution. Deliberately NOT
- * `getSession()`: no db-compat check, no sliding-expiry write, no cookie
+ * `getSession()`: no sliding-expiry write, no cookie
  * mutation — the root layout renders on every request in a context where
  * the cookie store is read-only, so the full session touch is both dead
  * weight and a throw hazard there. Returns null for missing/expired
diff --git a/src/lib/db-compat.ts b/src/lib/db-compat.ts
deleted file mode 100644
index b6e1151e0..000000000
--- a/src/lib/db-compat.ts
+++ /dev/null
@@ -1,277 +0,0 @@
-/**
- * Schema-bootstrap path for fresh self-host containers.
- *
- * Production deploys run `prisma migrate deploy` from the entrypoint,
- * so the canonical migration history lives in `prisma/migrations/`.
- * That history is the source of truth — any new column or table must
- * land there first.
- *
- * This file is the belt-and-suspenders companion: it issues
- * idempotent `ALTER TABLE … ADD COLUMN IF NOT EXISTS` statements on
- * boot so a container that came up against a database which somehow
- * missed a migration (interrupted deploy, restored from an older
- * dump, etc.) self-heals before the app starts taking traffic.
- *
- * Treat every statement here as a mirror of an existing migration —
- * never invent schema in this file. If a column appears here without
- * a corresponding entry under `prisma/migrations/`, that is a bug.
- */
-import { prisma } from "@/lib/db";
-
-let dbCompatibilityPromise: Promise<void> | null = null;
-
-async function ensureUserSchema() {
-  await prisma.$executeRawUnsafe(`
-    ALTER TABLE "users"
-    ADD COLUMN IF NOT EXISTS "role" TEXT NOT NULL DEFAULT 'USER';
-  `);
-
-  await prisma.$executeRawUnsafe(`
-    ALTER TABLE "users"
-    ADD COLUMN IF NOT EXISTS "date_of_birth" TIMESTAMP(3);
-  `);
-
-  await prisma.$executeRawUnsafe(`
-    ALTER TABLE "users"
-    ADD COLUMN IF NOT EXISTS "gender" TEXT;
-  `);
-
-  await prisma.$executeRawUnsafe(`
-    ALTER TABLE "users"
-    ADD COLUMN IF NOT EXISTS "telegram_bot_token" TEXT;
-  `);
-
-  await prisma.$executeRawUnsafe(`
-    ALTER TABLE "users"
-    ADD COLUMN IF NOT EXISTS "telegram_chat_id" TEXT;
-  `);
-
-  await prisma.$executeRawUnsafe(`
-    ALTER TABLE "users"
-    ADD COLUMN IF NOT EXISTS "telegram_enabled" BOOLEAN NOT NULL DEFAULT false;
-  `);
-
-  await prisma.$executeRawUnsafe(`
-    ALTER TABLE "users"
-    ADD COLUMN IF NOT EXISTS "withings_client_id_encrypted" TEXT;
-  `);
-
-  await prisma.$executeRawUnsafe(`
-    ALTER TABLE "users"
-    ADD COLUMN IF NOT EXISTS "withings_client_secret_encrypted" TEXT;
-  `);
-
-  await prisma.$executeRawUnsafe(`
-    ALTER TABLE "users"
-    ADD COLUMN IF NOT EXISTS "locale" TEXT;
-  `);
-
-  await prisma.$executeRawUnsafe(`
-    ALTER TABLE "users"
-    ADD COLUMN IF NOT EXISTS "onboarding_completed_at" TIMESTAMP(3);
-  `);
-}
-
-async function ensureAppSettingsSchema() {
-  await prisma.$executeRawUnsafe(`
-    CREATE TABLE IF NOT EXISTS "app_settings" (
-      "id" TEXT NOT NULL DEFAULT 'singleton',
-      "registration_enabled" BOOLEAN NOT NULL DEFAULT true,
-      CONSTRAINT "app_settings_pkey" PRIMARY KEY ("id")
-    );
-  `);
-
-  await prisma.$executeRawUnsafe(`
-    INSERT INTO "app_settings" ("id", "registration_enabled")
-    VALUES ('singleton', true)
-    ON CONFLICT ("id") DO NOTHING;
-  `);
-
-  await prisma.$executeRawUnsafe(`
-    ALTER TABLE "app_settings"
-    ADD COLUMN IF NOT EXISTS "default_locale" TEXT NOT NULL DEFAULT 'de';
-  `);
-
-  await prisma.$executeRawUnsafe(`
-    ALTER TABLE "app_settings"
-    ADD COLUMN IF NOT EXISTS "telegram_global" BOOLEAN NOT NULL DEFAULT true;
-  `);
-
-  await prisma.$executeRawUnsafe(`
-    ALTER TABLE "app_settings"
-    ADD COLUMN IF NOT EXISTS "ntfy_global" BOOLEAN NOT NULL DEFAULT true;
-  `);
-
-  await prisma.$executeRawUnsafe(`
-    ALTER TABLE "app_settings"
-    ADD COLUMN IF NOT EXISTS "web_push_global" BOOLEAN NOT NULL DEFAULT true;
-  `);
-
-  await prisma.$executeRawUnsafe(`
-    ALTER TABLE "app_settings"
-    ADD COLUMN IF NOT EXISTS "api_global" BOOLEAN NOT NULL DEFAULT true;
-  `);
-
-  await prisma.$executeRawUnsafe(`
-    ALTER TABLE "app_settings"
-    ADD COLUMN IF NOT EXISTS "web_push_vapid_public_key" TEXT;
-  `);
-
-  await prisma.$executeRawUnsafe(`
-    ALTER TABLE "app_settings"
-    ADD COLUMN IF NOT EXISTS "web_push_vapid_private_key_encrypted" TEXT;
-  `);
-
-  await prisma.$executeRawUnsafe(`
-    ALTER TABLE "app_settings"
-    ADD COLUMN IF NOT EXISTS "web_push_vapid_subject" TEXT;
-  `);
-
-  await prisma.$executeRawUnsafe(`
-    ALTER TABLE "app_settings"
-    ADD COLUMN IF NOT EXISTS "umami_enabled" BOOLEAN NOT NULL DEFAULT false;
-  `);
-
-  await prisma.$executeRawUnsafe(`
-    ALTER TABLE "app_settings"
-    ADD COLUMN IF NOT EXISTS "umami_script_url" TEXT;
-  `);
-
-  await prisma.$executeRawUnsafe(`
-    ALTER TABLE "app_settings"
-    ADD COLUMN IF NOT EXISTS "umami_website_id" TEXT;
-  `);
-
-  await prisma.$executeRawUnsafe(`
-    ALTER TABLE "app_settings"
-    ADD COLUMN IF NOT EXISTS "glitchtip_enabled" BOOLEAN NOT NULL DEFAULT false;
-  `);
-
-  await prisma.$executeRawUnsafe(`
-    ALTER TABLE "app_settings"
-    ADD COLUMN IF NOT EXISTS "glitchtip_dsn" TEXT;
-  `);
-
-  await prisma.$executeRawUnsafe(`
-    ALTER TABLE "app_settings"
-    ADD COLUMN IF NOT EXISTS "glitchtip_environment" TEXT;
-  `);
-}
-
-async function ensureMedicationSchema() {
-  await prisma.$executeRawUnsafe(`
-    ALTER TABLE "medications"
-    ADD COLUMN IF NOT EXISTS "notifications_enabled" BOOLEAN NOT NULL DEFAULT true;
-  `);
-
-  await prisma.$executeRawUnsafe(`
-    ALTER TABLE "medications"
-    ADD COLUMN IF NOT EXISTS "paused_at" TIMESTAMP(3);
-  `);
-}
-
-async function ensureMedicationScheduleSchema() {
-  await prisma.$executeRawUnsafe(`
-    ALTER TABLE "medication_schedules"
-    ADD COLUMN IF NOT EXISTS "dose" TEXT;
-  `);
-
-  await prisma.$executeRawUnsafe(`
-    ALTER TABLE "medication_schedules"
-    ADD COLUMN IF NOT EXISTS "days_of_week" TEXT;
-  `);
-}
-
-async function ensureEnumCompatibility() {
-  await prisma.$executeRawUnsafe(`
-    ALTER TYPE "intake_source" ADD VALUE IF NOT EXISTS 'IMPORT';
-  `);
-}
-
-/**
- * v1.5.0 — fresh container bootstrap for the persistent measurement-
- * rollup table. Mirrors `prisma/migrations/0067_v1434_measurement_rollups`
- * so a container that came up against a database which skipped the
- * migration still self-heals before the app takes traffic.
- *
- * Idempotent: `CREATE TYPE` is guarded with a `pg_type` lookup
- * (Postgres rejects `CREATE TYPE IF NOT EXISTS`), `CREATE TABLE` /
- * `CREATE INDEX` carry `IF NOT EXISTS`. The FK is added via the
- * `pg_constraint` lookup so re-running the bootstrap on a populated
- * DB is a no-op.
- */
-async function ensureMeasurementRollupsSchema() {
-  await prisma.$executeRawUnsafe(`
-    DO $$
-    BEGIN
-        IF NOT EXISTS (
-            SELECT 1 FROM pg_type
-            WHERE typname = 'measurement_rollup_granularity'
-        ) THEN
-            CREATE TYPE "measurement_rollup_granularity"
-                AS ENUM ('DAY', 'WEEK', 'MONTH', 'YEAR');
-        END IF;
-    END
-    $$;
-  `);
-
-  await prisma.$executeRawUnsafe(`
-    CREATE TABLE IF NOT EXISTS "measurement_rollups" (
-      "user_id"      TEXT                              NOT NULL,
-      "type"         "measurement_type"                NOT NULL,
-      "granularity"  "measurement_rollup_granularity"  NOT NULL,
-      "bucket_start" TIMESTAMPTZ(3)                    NOT NULL,
-      "count"        INTEGER                           NOT NULL,
-      "mean"         DOUBLE PRECISION                  NOT NULL,
-      "min_value"    DOUBLE PRECISION                  NOT NULL,
-      "max_value"    DOUBLE PRECISION                  NOT NULL,
-      "sd"           DOUBLE PRECISION,
-      "slope"        DOUBLE PRECISION,
-      "r2"           DOUBLE PRECISION,
-      "computed_at"  TIMESTAMPTZ(3)                    NOT NULL DEFAULT CURRENT_TIMESTAMP,
-      CONSTRAINT "measurement_rollups_pkey"
-        PRIMARY KEY ("user_id", "type", "granularity", "bucket_start")
-    );
-  `);
-
-  await prisma.$executeRawUnsafe(`
-    CREATE INDEX IF NOT EXISTS "measurement_rollups_user_type_granularity_bucket_desc_idx"
-      ON "measurement_rollups" ("user_id", "type", "granularity", "bucket_start" DESC);
-  `);
-
-  await prisma.$executeRawUnsafe(`
-    DO $$
-    BEGIN
-        IF NOT EXISTS (
-            SELECT 1 FROM pg_constraint
-            WHERE conname = 'measurement_rollups_user_id_fkey'
-        ) THEN
-            ALTER TABLE "measurement_rollups"
-              ADD CONSTRAINT "measurement_rollups_user_id_fkey"
-              FOREIGN KEY ("user_id") REFERENCES "users"("id")
-              ON DELETE CASCADE ON UPDATE CASCADE;
-        END IF;
-    END
-    $$;
-  `);
-}
-
-export async function ensureDbCompatibility() {
-  if (!dbCompatibilityPromise) {
-    dbCompatibilityPromise = Promise.all([
-      ensureUserSchema(),
-      ensureAppSettingsSchema(),
-      ensureMedicationSchema(),
-      ensureMedicationScheduleSchema(),
-      ensureEnumCompatibility(),
-      ensureMeasurementRollupsSchema(),
-    ])
-      .then(() => undefined)
-      .catch((error) => {
-        dbCompatibilityPromise = null;
-        throw error;
-      });
-  }
-
-  await dbCompatibilityPromise;
-}
diff --git a/tests/integration/account-deletion-grace.test.ts b/tests/integration/account-deletion-grace.test.ts
index 410474e40..337331945 100644
--- a/tests/integration/account-deletion-grace.test.ts
+++ b/tests/integration/account-deletion-grace.test.ts
@@ -42,10 +42,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const adminNotices = vi.hoisted(() => [] as Array<Record<string, unknown>>);
 vi.mock("@/lib/notifications/dispatch-localised", () => ({
   dispatchLocalisedNotification: vi.fn(
diff --git a/tests/integration/account-grant-lifecycle.test.ts b/tests/integration/account-grant-lifecycle.test.ts
index eb573e09d..1224db4ed 100644
--- a/tests/integration/account-grant-lifecycle.test.ts
+++ b/tests/integration/account-grant-lifecycle.test.ts
@@ -65,10 +65,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 let counter = 0;
 
 async function makeUser(label: string, role: "USER" | "ADMIN" = "USER") {
diff --git a/tests/integration/acting-account-resolver.test.ts b/tests/integration/acting-account-resolver.test.ts
index 923088189..5a7d6f4b1 100644
--- a/tests/integration/acting-account-resolver.test.ts
+++ b/tests/integration/acting-account-resolver.test.ts
@@ -63,10 +63,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 import {
   ACCOUNT_SELECTOR_HEADER,
   apiHandler,
diff --git a/tests/integration/activity-calendar-read.test.ts b/tests/integration/activity-calendar-read.test.ts
index 2c6c86c42..4169cda1e 100644
--- a/tests/integration/activity-calendar-read.test.ts
+++ b/tests/integration/activity-calendar-read.test.ts
@@ -15,10 +15,6 @@ import { readActivityDays } from "@/lib/activity/calendar-read";
 import { invalidateUserTimezone } from "@/lib/tz/resolver";
 import { userDayKey } from "@/lib/tz/format";
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const prisma = getPrismaClient();
 const TZ = "Europe/Berlin";
 const USER = "activity-reader";
diff --git a/tests/integration/admin-backups-audit.test.ts b/tests/integration/admin-backups-audit.test.ts
index 0a68fd32a..10b7b00c9 100644
--- a/tests/integration/admin-backups-audit.test.ts
+++ b/tests/integration/admin-backups-audit.test.ts
@@ -48,10 +48,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 // Stub `getGlobalBoss` so the run endpoint can audit-log its happy
 // path without booting an actual pg-boss worker against the test DB.
 // The fake boss returns a deterministic job id so the audit row can be
diff --git a/tests/integration/admin-backups-canonical-roundtrip.test.ts b/tests/integration/admin-backups-canonical-roundtrip.test.ts
index 334f0507e..2235729ea 100644
--- a/tests/integration/admin-backups-canonical-roundtrip.test.ts
+++ b/tests/integration/admin-backups-canonical-roundtrip.test.ts
@@ -48,10 +48,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("@/lib/cache/invalidate", () => ({
   invalidateUserData: vi.fn(),
 }));
diff --git a/tests/integration/admin-backups-download.test.ts b/tests/integration/admin-backups-download.test.ts
index 7ceb2f598..faa2ea064 100644
--- a/tests/integration/admin-backups-download.test.ts
+++ b/tests/integration/admin-backups-download.test.ts
@@ -45,10 +45,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 beforeEach(async () => {
   await truncateAllTables(getPrismaClient());
   cookieJar.clear();
diff --git a/tests/integration/admin-backups-restore.test.ts b/tests/integration/admin-backups-restore.test.ts
index a27239b1b..e9bcfb8d8 100644
--- a/tests/integration/admin-backups-restore.test.ts
+++ b/tests/integration/admin-backups-restore.test.ts
@@ -49,10 +49,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 beforeEach(async () => {
   await truncateAllTables(getPrismaClient());
   cookieJar.clear();
diff --git a/tests/integration/admin-backups-upload-too-large.test.ts b/tests/integration/admin-backups-upload-too-large.test.ts
index f288cfa02..4ed38dddf 100644
--- a/tests/integration/admin-backups-upload-too-large.test.ts
+++ b/tests/integration/admin-backups-upload-too-large.test.ts
@@ -37,9 +37,6 @@ vi.mock("next/headers", async () => {
     })),
   };
 });
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("@/lib/export/store-backup-blob", async (importOriginal) => {
   const actual =
     await importOriginal<typeof import("@/lib/export/store-backup-blob")>();
diff --git a/tests/integration/admin-backups-upload.test.ts b/tests/integration/admin-backups-upload.test.ts
index 26edf32f6..bbbbf7707 100644
--- a/tests/integration/admin-backups-upload.test.ts
+++ b/tests/integration/admin-backups-upload.test.ts
@@ -41,10 +41,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 beforeEach(async () => {
   await truncateAllTables(getPrismaClient());
   cookieJar.clear();
diff --git a/tests/integration/admin-data-wipe.test.ts b/tests/integration/admin-data-wipe.test.ts
index b8dff9919..81605562c 100644
--- a/tests/integration/admin-data-wipe.test.ts
+++ b/tests/integration/admin-data-wipe.test.ts
@@ -66,10 +66,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 beforeEach(async () => {
   await truncateAllTables(getPrismaClient());
   cookieJar.clear();
diff --git a/tests/integration/admin-drain-cumulative-endpoint.test.ts b/tests/integration/admin-drain-cumulative-endpoint.test.ts
index 014deb2c7..4c9969aaa 100644
--- a/tests/integration/admin-drain-cumulative-endpoint.test.ts
+++ b/tests/integration/admin-drain-cumulative-endpoint.test.ts
@@ -35,10 +35,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 beforeEach(async () => {
   await truncateAllTables(getPrismaClient());
   cookieJar.clear();
diff --git a/tests/integration/admin-host-metrics.test.ts b/tests/integration/admin-host-metrics.test.ts
index 523b9025a..589d89c21 100644
--- a/tests/integration/admin-host-metrics.test.ts
+++ b/tests/integration/admin-host-metrics.test.ts
@@ -37,10 +37,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 beforeEach(async () => {
   await truncateAllTables(getPrismaClient());
   cookieJar.clear();
diff --git a/tests/integration/admin-reset-password.test.ts b/tests/integration/admin-reset-password.test.ts
index ca33f1497..db189f7d4 100644
--- a/tests/integration/admin-reset-password.test.ts
+++ b/tests/integration/admin-reset-password.test.ts
@@ -42,10 +42,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const STRONG_NEW_PW = "Adm1nReset!P@ssw0rd789";
 
 async function seedCaller(role: "ADMIN" | "USER"): Promise<{
diff --git a/tests/integration/admin-rollups-recompute.test.ts b/tests/integration/admin-rollups-recompute.test.ts
index 0ae49e279..780312dcb 100644
--- a/tests/integration/admin-rollups-recompute.test.ts
+++ b/tests/integration/admin-rollups-recompute.test.ts
@@ -42,10 +42,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("@/lib/rollups/full-backfill", async (importOriginal) => {
   const actual =
     await importOriginal<typeof import("@/lib/rollups/full-backfill")>();
diff --git a/tests/integration/admin-support-report.test.ts b/tests/integration/admin-support-report.test.ts
index 94b0e431e..2d26b17a5 100644
--- a/tests/integration/admin-support-report.test.ts
+++ b/tests/integration/admin-support-report.test.ts
@@ -37,10 +37,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 import { GET } from "@/app/api/admin/support-report/route";
 
 beforeEach(async () => {
diff --git a/tests/integration/admin-user-deletion.test.ts b/tests/integration/admin-user-deletion.test.ts
index 4bfdcd2a7..7c1280d59 100644
--- a/tests/integration/admin-user-deletion.test.ts
+++ b/tests/integration/admin-user-deletion.test.ts
@@ -33,10 +33,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const DAY_MS = 24 * 60 * 60 * 1000;
 const HOUR_MS = 60 * 60 * 1000;
 
diff --git a/tests/integration/ai-consent-explicit.test.ts b/tests/integration/ai-consent-explicit.test.ts
index c10652bfc..ef3a706f0 100644
--- a/tests/integration/ai-consent-explicit.test.ts
+++ b/tests/integration/ai-consent-explicit.test.ts
@@ -45,10 +45,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const providerSpy = vi.fn(async () => ({
   content: JSON.stringify({ summary: "A calm and steady stretch." }),
   model: "spy-model",
diff --git a/tests/integration/ai-extraction-capability.test.ts b/tests/integration/ai-extraction-capability.test.ts
index 263eb2c48..331b2e757 100644
--- a/tests/integration/ai-extraction-capability.test.ts
+++ b/tests/integration/ai-extraction-capability.test.ts
@@ -59,10 +59,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 // v1.40 — a lab scan is queued for the background worker; a queue that takes
 // the send lets the route answer 202, and the test then runs the worker.
 vi.mock("@/lib/jobs/boss-instance", () => ({
diff --git a/tests/integration/ai-optional-actions.test.ts b/tests/integration/ai-optional-actions.test.ts
index 255b4467a..403a21768 100644
--- a/tests/integration/ai-optional-actions.test.ts
+++ b/tests/integration/ai-optional-actions.test.ts
@@ -47,10 +47,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 // Provider spies: a refusal must never reach either.
 const runner = vi.hoisted(() => ({
   raw: vi.fn(),
diff --git a/tests/integration/ai-optional-data-routes.test.ts b/tests/integration/ai-optional-data-routes.test.ts
index 465e775d0..303682912 100644
--- a/tests/integration/ai-optional-data-routes.test.ts
+++ b/tests/integration/ai-optional-data-routes.test.ts
@@ -46,10 +46,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const DAY = 24 * 60 * 60 * 1000;
 const NOW = Date.now();
 
diff --git a/tests/integration/ai-optional-jobs.test.ts b/tests/integration/ai-optional-jobs.test.ts
index f3b4c61d0..6af05fd89 100644
--- a/tests/integration/ai-optional-jobs.test.ts
+++ b/tests/integration/ai-optional-jobs.test.ts
@@ -23,10 +23,6 @@ import { beforeEach, describe, expect, it, vi } from "vitest";
 
 import { getPrismaClient, truncateAllTables } from "./setup";
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const providerSpy = vi.fn(async () => ({
   content: JSON.stringify({ summary: "A calm and steady stretch." }),
   model: "spy-model",
diff --git a/tests/integration/ai-optional-mixed-routes.test.ts b/tests/integration/ai-optional-mixed-routes.test.ts
index 2475a1ab5..3e0683969 100644
--- a/tests/integration/ai-optional-mixed-routes.test.ts
+++ b/tests/integration/ai-optional-mixed-routes.test.ts
@@ -46,10 +46,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 // The two enqueue seams a mixed read may reach. Spied, never run: the test
 // asserts they are not called while a capability is unavailable.
 const enqueueNarrativeWarm = vi.fn(async () => undefined);
diff --git a/tests/integration/ai-provider-key-removal.test.ts b/tests/integration/ai-provider-key-removal.test.ts
index c1944acf7..c307d9da9 100644
--- a/tests/integration/ai-provider-key-removal.test.ts
+++ b/tests/integration/ai-provider-key-removal.test.ts
@@ -37,10 +37,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 async function seedAccountWithKeys(): Promise<string> {
   const prisma = getPrismaClient();
   const { encrypt } = await import("@/lib/crypto");
diff --git a/tests/integration/ai-usage-levels.test.ts b/tests/integration/ai-usage-levels.test.ts
index f19361326..a0c629e33 100644
--- a/tests/integration/ai-usage-levels.test.ts
+++ b/tests/integration/ai-usage-levels.test.ts
@@ -43,10 +43,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 // The queue is not under test: record what the invalidator enqueues.
 const enqueued = vi.hoisted(() => [] as Array<{ metric: string }>);
 vi.mock("@/lib/jobs/insight-status-generate-shared", async (orig) => ({
diff --git a/tests/integration/analytics-bp-aggregate-paged.test.ts b/tests/integration/analytics-bp-aggregate-paged.test.ts
index ca33c5d19..ac8b48648 100644
--- a/tests/integration/analytics-bp-aggregate-paged.test.ts
+++ b/tests/integration/analytics-bp-aggregate-paged.test.ts
@@ -50,10 +50,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 // Read wide-events back out of the in-memory ring buffer the
 // `emitEvent` transport already populates — avoids coupling to the
 // Loki/stdout plumbing and works regardless of `LOG_SAMPLE_RATE`.
diff --git a/tests/integration/analytics-health-score.test.ts b/tests/integration/analytics-health-score.test.ts
index b2a0b0363..ac765f95c 100644
--- a/tests/integration/analytics-health-score.test.ts
+++ b/tests/integration/analytics-health-score.test.ts
@@ -38,10 +38,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 beforeEach(async () => {
   await truncateAllTables(getPrismaClient());
   cookieJar.clear();
diff --git a/tests/integration/analytics-sleep-stages.test.ts b/tests/integration/analytics-sleep-stages.test.ts
index a944b591c..da5cb8513 100644
--- a/tests/integration/analytics-sleep-stages.test.ts
+++ b/tests/integration/analytics-sleep-stages.test.ts
@@ -39,10 +39,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 beforeEach(async () => {
   await truncateAllTables(getPrismaClient());
   cookieJar.clear();
diff --git a/tests/integration/analytics-summaries-slice.test.ts b/tests/integration/analytics-summaries-slice.test.ts
index 7c88560a8..52a71b694 100644
--- a/tests/integration/analytics-summaries-slice.test.ts
+++ b/tests/integration/analytics-summaries-slice.test.ts
@@ -51,10 +51,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 beforeEach(async () => {
   await truncateAllTables(getPrismaClient());
   cookieJar.clear();
diff --git a/tests/integration/analytics-weekday-tz.test.ts b/tests/integration/analytics-weekday-tz.test.ts
index 2e2101d2f..1f23bc43a 100644
--- a/tests/integration/analytics-weekday-tz.test.ts
+++ b/tests/integration/analytics-weekday-tz.test.ts
@@ -43,10 +43,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 beforeEach(async () => {
   await truncateAllTables(getPrismaClient());
   cookieJar.clear();
diff --git a/tests/integration/apns-dispatch.test.ts b/tests/integration/apns-dispatch.test.ts
index 03b4fe0bb..9995a4f3c 100644
--- a/tests/integration/apns-dispatch.test.ts
+++ b/tests/integration/apns-dispatch.test.ts
@@ -55,10 +55,6 @@ vi.mock("@/lib/notifications/senders/telegram", () => ({
   sendViaTelegram: (...args: unknown[]) => telegramSendMock(...args),
 }));
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 import { getPrismaClient, truncateAllTables } from "./setup";
 
 const TEST_USER_ID = "user-apns-dispatch-test";
diff --git a/tests/integration/apple-health-import-ecg.test.ts b/tests/integration/apple-health-import-ecg.test.ts
index 2bd581f7d..751846661 100644
--- a/tests/integration/apple-health-import-ecg.test.ts
+++ b/tests/integration/apple-health-import-ecg.test.ts
@@ -23,10 +23,6 @@ import {
 } from "@/lib/jobs/apple-health-import-worker";
 import { getPrismaClient, truncateAllTables } from "./setup";
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("@/lib/jobs/boss-instance", () => ({
   getGlobalBoss: vi.fn(() => null),
 }));
diff --git a/tests/integration/apple-health-import-reconcile.test.ts b/tests/integration/apple-health-import-reconcile.test.ts
index 7dbd7c9a4..191508724 100644
--- a/tests/integration/apple-health-import-reconcile.test.ts
+++ b/tests/integration/apple-health-import-reconcile.test.ts
@@ -26,10 +26,6 @@ import {
   _setWorkerPrismaForTests,
 } from "@/lib/jobs/apple-health-import-worker";
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 // Controllable pg-boss handle: the reconcile consults `getJobById` for a
 // row's real queue state.
 const bossMock = vi.hoisted(() => ({
diff --git a/tests/integration/apple-health-import-rollup-window.test.ts b/tests/integration/apple-health-import-rollup-window.test.ts
index be558605e..a42b8be96 100644
--- a/tests/integration/apple-health-import-rollup-window.test.ts
+++ b/tests/integration/apple-health-import-rollup-window.test.ts
@@ -24,9 +24,6 @@ import {
 } from "@/lib/jobs/apple-health-import-worker";
 import { ROLLUP_FOLD_WINDOW_MS } from "@/lib/rollups/measurement-rollups";
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("@/lib/jobs/boss-instance", () => ({
   getGlobalBoss: vi.fn(() => null),
 }));
diff --git a/tests/integration/apple-health-import-worker-failures.test.ts b/tests/integration/apple-health-import-worker-failures.test.ts
index 2793396ad..51bae2417 100644
--- a/tests/integration/apple-health-import-worker-failures.test.ts
+++ b/tests/integration/apple-health-import-worker-failures.test.ts
@@ -34,10 +34,6 @@ import {
   type AppleHealthImportPayload,
 } from "@/lib/jobs/apple-health-import-worker";
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 // No pg-boss attached — the end-of-import rollup fold's enqueue helpers
 // are silent no-ops without a boss.
 vi.mock("@/lib/jobs/boss-instance", () => ({
diff --git a/tests/integration/auth-flow.test.ts b/tests/integration/auth-flow.test.ts
index da873f510..d57c94b55 100644
--- a/tests/integration/auth-flow.test.ts
+++ b/tests/integration/auth-flow.test.ts
@@ -1,9 +1,8 @@
 /**
  * Integration regression guard for `src/lib/auth/session.ts`.
  *
- * The session helpers couple Postgres (`Session` row), the `cookies()`
- * adapter from `next/headers`, and the `db-compat` schema-migration
- * fallback. A unit test with a mocked Prisma client cannot verify the
+ * The session helpers couple Postgres (`Session` row) and the `cookies()`
+ * adapter from `next/headers`. A unit test with a mocked Prisma client cannot verify the
  * end-to-end flow — particularly the expired-session purge behaviour,
  * which silently deletes the row before returning null.
  */
@@ -38,12 +37,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-// `db-compat` runs ALTER TABLE IF NOT EXISTS statements that are no-ops
-// against a freshly-migrated schema but slow tests down — short-circuit.
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 beforeEach(async () => {
   await truncateAllTables(getPrismaClient());
   cookieJar.clear();
diff --git a/tests/integration/auth-ledger-cleanup.test.ts b/tests/integration/auth-ledger-cleanup.test.ts
index 8de6fe9bd..be4ddcee4 100644
--- a/tests/integration/auth-ledger-cleanup.test.ts
+++ b/tests/integration/auth-ledger-cleanup.test.ts
@@ -13,10 +13,6 @@ import { cleanupAuthLedgers } from "@/lib/jobs/auth-ledger-cleanup";
 
 import { getPrismaClient, truncateAllTables } from "./setup";
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const USER = "auth-ledger-user";
 const NOW = new Date("2026-10-20T03:35:00.000Z");
 const DAY = 86_400_000;
diff --git a/tests/integration/auth-me-ai-capabilities.test.ts b/tests/integration/auth-me-ai-capabilities.test.ts
index 090dbcb14..5fa15f6a8 100644
--- a/tests/integration/auth-me-ai-capabilities.test.ts
+++ b/tests/integration/auth-me-ai-capabilities.test.ts
@@ -41,10 +41,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const ALL = [
   "coach",
   "briefing",
diff --git a/tests/integration/auth-me-coach-reasoning.test.ts b/tests/integration/auth-me-coach-reasoning.test.ts
index 186352bd5..f93095591 100644
--- a/tests/integration/auth-me-coach-reasoning.test.ts
+++ b/tests/integration/auth-me-coach-reasoning.test.ts
@@ -40,10 +40,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 interface CoachReasoning {
   level: string;
   preference: string;
diff --git a/tests/integration/auth-password-change.test.ts b/tests/integration/auth-password-change.test.ts
index 90fa48f52..18cb9e89a 100644
--- a/tests/integration/auth-password-change.test.ts
+++ b/tests/integration/auth-password-change.test.ts
@@ -44,10 +44,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const STRONG_CURRENT = "OldStrongP@ssw0rd!123abc";
 const STRONG_NEW = "NewStrongP@ssw0rd!456xyz";
 
diff --git a/tests/integration/backup-chunked-storage.test.ts b/tests/integration/backup-chunked-storage.test.ts
index b53e9ae51..1d2418c27 100644
--- a/tests/integration/backup-chunked-storage.test.ts
+++ b/tests/integration/backup-chunked-storage.test.ts
@@ -52,10 +52,6 @@ vi.mock("next/headers", async () => {
     })),
   };
 });
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const COUNT = 12_000;
 /** Small pieces, so a test-sized record spans many of them. */
 const SMALL = { chunkBytes: 4 * 1024 };
diff --git a/tests/integration/backup-custom-cycle-symptom-restore.test.ts b/tests/integration/backup-custom-cycle-symptom-restore.test.ts
index 98ff701ba..8f621afa6 100644
--- a/tests/integration/backup-custom-cycle-symptom-restore.test.ts
+++ b/tests/integration/backup-custom-cycle-symptom-restore.test.ts
@@ -63,10 +63,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("@/lib/cache/invalidate", () => ({
   invalidateUserData: vi.fn(),
 }));
diff --git a/tests/integration/backup-cycle-cross-key-restore.test.ts b/tests/integration/backup-cycle-cross-key-restore.test.ts
index 4d3f50aee..0ad7ca5eb 100644
--- a/tests/integration/backup-cycle-cross-key-restore.test.ts
+++ b/tests/integration/backup-cycle-cross-key-restore.test.ts
@@ -46,10 +46,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("@/lib/cache/invalidate", () => ({
   invalidateUserData: vi.fn(),
 }));
diff --git a/tests/integration/backup-cycle-symptom-severity-restore.test.ts b/tests/integration/backup-cycle-symptom-severity-restore.test.ts
index cf392785b..762193a5b 100644
--- a/tests/integration/backup-cycle-symptom-severity-restore.test.ts
+++ b/tests/integration/backup-cycle-symptom-severity-restore.test.ts
@@ -51,10 +51,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("@/lib/cache/invalidate", () => ({
   invalidateUserData: vi.fn(),
 }));
diff --git a/tests/integration/backup-document-import-ledger.test.ts b/tests/integration/backup-document-import-ledger.test.ts
index fa207d3c8..228c97d89 100644
--- a/tests/integration/backup-document-import-ledger.test.ts
+++ b/tests/integration/backup-document-import-ledger.test.ts
@@ -45,10 +45,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("@/lib/cache/invalidate", async (importOriginal) => {
   const actual =
     await importOriginal<typeof import("@/lib/cache/invalidate")>();
diff --git a/tests/integration/backup-document-streaming.test.ts b/tests/integration/backup-document-streaming.test.ts
index 63c087d9d..2768a7644 100644
--- a/tests/integration/backup-document-streaming.test.ts
+++ b/tests/integration/backup-document-streaming.test.ts
@@ -42,10 +42,6 @@ import { STORED_BACKUP_SELECT } from "@/lib/export/stored-backup";
 import { parseBackupPayload } from "@/lib/validations/backup";
 import { summarizeBackup } from "@/lib/validations/backup-summary";
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const prisma = getPrismaClient();
 const OWNER_ID = "backup-document-owner";
 
diff --git a/tests/integration/backup-dr-stamps-and-ciphertext.test.ts b/tests/integration/backup-dr-stamps-and-ciphertext.test.ts
index 512f70636..4a90e80a6 100644
--- a/tests/integration/backup-dr-stamps-and-ciphertext.test.ts
+++ b/tests/integration/backup-dr-stamps-and-ciphertext.test.ts
@@ -53,10 +53,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const prisma = getPrismaClient();
 const CREATED = new Date("2026-03-03T03:03:03.000Z");
 const UPDATED = new Date("2026-04-04T04:04:04.000Z");
diff --git a/tests/integration/backup-erased-account-restore.test.ts b/tests/integration/backup-erased-account-restore.test.ts
index 3b2ea8c7a..6eb2ae2e3 100644
--- a/tests/integration/backup-erased-account-restore.test.ts
+++ b/tests/integration/backup-erased-account-restore.test.ts
@@ -78,10 +78,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("@/lib/notifications/dispatch-localised", () => ({
   dispatchLocalisedNotification: vi.fn(async () => undefined),
 }));
diff --git a/tests/integration/backup-key-needs.test.ts b/tests/integration/backup-key-needs.test.ts
index 3aeb4179c..9edbb180f 100644
--- a/tests/integration/backup-key-needs.test.ts
+++ b/tests/integration/backup-key-needs.test.ts
@@ -41,10 +41,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const saved = {
   key: process.env.ENCRYPTION_KEY,
   keys: process.env.ENCRYPTION_KEYS,
diff --git a/tests/integration/backup-legacy-rmssd-restore.test.ts b/tests/integration/backup-legacy-rmssd-restore.test.ts
index 25a8ad4c2..45c376a23 100644
--- a/tests/integration/backup-legacy-rmssd-restore.test.ts
+++ b/tests/integration/backup-legacy-rmssd-restore.test.ts
@@ -39,10 +39,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("@/lib/cache/invalidate", async (importOriginal) => {
   const actual =
     await importOriginal<typeof import("@/lib/cache/invalidate")>();
diff --git a/tests/integration/backup-missing-section-restore.test.ts b/tests/integration/backup-missing-section-restore.test.ts
index 1c3afad66..7eaaba04a 100644
--- a/tests/integration/backup-missing-section-restore.test.ts
+++ b/tests/integration/backup-missing-section-restore.test.ts
@@ -57,10 +57,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("@/lib/cache/invalidate", () => ({
   invalidateUserData: vi.fn(),
 }));
diff --git a/tests/integration/backup-mood-label-cross-key-restore.test.ts b/tests/integration/backup-mood-label-cross-key-restore.test.ts
index f1a0b6719..7a52cc152 100644
--- a/tests/integration/backup-mood-label-cross-key-restore.test.ts
+++ b/tests/integration/backup-mood-label-cross-key-restore.test.ts
@@ -40,10 +40,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("@/lib/cache/invalidate", () => ({
   invalidateUserData: vi.fn(),
 }));
diff --git a/tests/integration/backup-parity.test.ts b/tests/integration/backup-parity.test.ts
index 3e83e614c..c8e2d98f1 100644
--- a/tests/integration/backup-parity.test.ts
+++ b/tests/integration/backup-parity.test.ts
@@ -123,10 +123,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 /** What the restore asked of the world outside its transaction. */
 const effects = vi.hoisted(() => ({
   invalidated: [] as string[],
diff --git a/tests/integration/backup-portable-file-restore.test.ts b/tests/integration/backup-portable-file-restore.test.ts
index a840163ee..380f891cd 100644
--- a/tests/integration/backup-portable-file-restore.test.ts
+++ b/tests/integration/backup-portable-file-restore.test.ts
@@ -76,10 +76,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("@/lib/cache/invalidate", () => ({
   invalidateUserData: vi.fn(),
 }));
diff --git a/tests/integration/backup-preview.test.ts b/tests/integration/backup-preview.test.ts
index 81757c6c7..03702b3f3 100644
--- a/tests/integration/backup-preview.test.ts
+++ b/tests/integration/backup-preview.test.ts
@@ -45,10 +45,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const opened = vi.hoisted(() => ({ count: 0 }));
 vi.mock("@/lib/export/stored-backup", async (importOriginal) => {
   const actual =
diff --git a/tests/integration/backup-qualitative-lab-restore.test.ts b/tests/integration/backup-qualitative-lab-restore.test.ts
index c0f0dc071..232ffe4ee 100644
--- a/tests/integration/backup-qualitative-lab-restore.test.ts
+++ b/tests/integration/backup-qualitative-lab-restore.test.ts
@@ -44,10 +44,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("@/lib/cache/invalidate", async (importOriginal) => {
   const actual =
     await importOriginal<typeof import("@/lib/cache/invalidate")>();
diff --git a/tests/integration/backup-restore-job.test.ts b/tests/integration/backup-restore-job.test.ts
index 29c0be93d..7d3d934ba 100644
--- a/tests/integration/backup-restore-job.test.ts
+++ b/tests/integration/backup-restore-job.test.ts
@@ -75,10 +75,6 @@ vi.mock("next/headers", async () => {
     })),
   };
 });
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 /** A queue that records what it is sent and what it is told is finished. */
 function recordingBoss() {
   const sent: Array<{ queue: string; data: unknown }> = [];
diff --git a/tests/integration/backup-restore-memory.test.ts b/tests/integration/backup-restore-memory.test.ts
index a3d00e570..56648a68b 100644
--- a/tests/integration/backup-restore-memory.test.ts
+++ b/tests/integration/backup-restore-memory.test.ts
@@ -35,10 +35,6 @@ import { afterAll, beforeAll, describe, expect, it, vi } from "vitest";
 
 import { getPrismaClient, truncateAllTables } from "./setup";
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const OWNER = "restore-memory-owner";
 const ROWS = 150_000;
 
diff --git a/tests/integration/backup-restore-statement-timeout.test.ts b/tests/integration/backup-restore-statement-timeout.test.ts
index 0fd6d182a..cd8ef27ce 100644
--- a/tests/integration/backup-restore-statement-timeout.test.ts
+++ b/tests/integration/backup-restore-statement-timeout.test.ts
@@ -71,10 +71,6 @@ vi.mock("next/headers", async () => {
     })),
   };
 });
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const COUNT = 600;
 
 /**
diff --git a/tests/integration/backup-round-trip.test.ts b/tests/integration/backup-round-trip.test.ts
index 0698b1bb1..cc617b2ec 100644
--- a/tests/integration/backup-round-trip.test.ts
+++ b/tests/integration/backup-round-trip.test.ts
@@ -147,10 +147,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("@/lib/cache/invalidate", () => ({
   invalidateUserData: vi.fn(),
 }));
diff --git a/tests/integration/backup-token-link-restore.test.ts b/tests/integration/backup-token-link-restore.test.ts
index f5881593b..802439814 100644
--- a/tests/integration/backup-token-link-restore.test.ts
+++ b/tests/integration/backup-token-link-restore.test.ts
@@ -39,10 +39,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("@/lib/cache/invalidate", async (importOriginal) => {
   const actual =
     await importOriginal<typeof import("@/lib/cache/invalidate")>();
diff --git a/tests/integration/backup-unknown-catalogue-key-restore.test.ts b/tests/integration/backup-unknown-catalogue-key-restore.test.ts
index 6347ba32f..7248b910c 100644
--- a/tests/integration/backup-unknown-catalogue-key-restore.test.ts
+++ b/tests/integration/backup-unknown-catalogue-key-restore.test.ts
@@ -61,10 +61,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("@/lib/cache/invalidate", () => ({
   invalidateUserData: vi.fn(),
 }));
diff --git a/tests/integration/backup-upload-document-memory.test.ts b/tests/integration/backup-upload-document-memory.test.ts
index c3221d22f..1cf0c8949 100644
--- a/tests/integration/backup-upload-document-memory.test.ts
+++ b/tests/integration/backup-upload-document-memory.test.ts
@@ -47,10 +47,6 @@ import { afterAll, beforeAll, describe, expect, it, vi } from "vitest";
 import { cookieJar, headerJar } from "./mock-next-headers";
 import { getPrismaClient, truncateAllTables } from "./setup";
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const prisma = getPrismaClient();
 
 /** A hundred documents of 2.75 MiB of base64 each: about 275 MB of vault. */
diff --git a/tests/integration/backup-visits-cross-key-restore.test.ts b/tests/integration/backup-visits-cross-key-restore.test.ts
index 234f6c136..c3b11f06e 100644
--- a/tests/integration/backup-visits-cross-key-restore.test.ts
+++ b/tests/integration/backup-visits-cross-key-restore.test.ts
@@ -43,10 +43,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("@/lib/cache/invalidate", () => ({
   invalidateUserData: vi.fn(),
 }));
diff --git a/tests/integration/bearer-scope-enforcement.test.ts b/tests/integration/bearer-scope-enforcement.test.ts
index 40a5b3b0d..551fbdd45 100644
--- a/tests/integration/bearer-scope-enforcement.test.ts
+++ b/tests/integration/bearer-scope-enforcement.test.ts
@@ -55,10 +55,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 beforeEach(async () => {
   await truncateAllTables(getPrismaClient());
   cookieJar.clear();
diff --git a/tests/integration/biomarker-backup-completeness.test.ts b/tests/integration/biomarker-backup-completeness.test.ts
index 7fe4faa53..f787d0510 100644
--- a/tests/integration/biomarker-backup-completeness.test.ts
+++ b/tests/integration/biomarker-backup-completeness.test.ts
@@ -44,10 +44,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("@/lib/cache/invalidate", async (importOriginal) => ({
   ...(await importOriginal<typeof import("@/lib/cache/invalidate")>()),
   invalidateUserData: vi.fn(),
diff --git a/tests/integration/biomarker-detail.test.ts b/tests/integration/biomarker-detail.test.ts
index 2de6f2362..b9c408396 100644
--- a/tests/integration/biomarker-detail.test.ts
+++ b/tests/integration/biomarker-detail.test.ts
@@ -39,10 +39,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 beforeEach(async () => {
   await truncateAllTables(getPrismaClient());
   cookieJar.clear();
diff --git a/tests/integration/biomarker-merge.test.ts b/tests/integration/biomarker-merge.test.ts
index 87ac6b667..b3fdad383 100644
--- a/tests/integration/biomarker-merge.test.ts
+++ b/tests/integration/biomarker-merge.test.ts
@@ -35,10 +35,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const USER_ID = "user-biomarker-merge";
 const OTHER_ID = "user-biomarker-merge-other";
 const DAY_MS = 86_400_000;
diff --git a/tests/integration/blood-pressure-reading-delete.test.ts b/tests/integration/blood-pressure-reading-delete.test.ts
index 2e930187d..445511cc8 100644
--- a/tests/integration/blood-pressure-reading-delete.test.ts
+++ b/tests/integration/blood-pressure-reading-delete.test.ts
@@ -44,10 +44,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const USER = "user-bp-reading-delete";
 const AT = new Date("2026-10-20T07:30:00.000Z");
 const MINUTE_LATER = new Date(AT.getTime() + 60_000);
diff --git a/tests/integration/body-sites.test.ts b/tests/integration/body-sites.test.ts
index 77fb04830..5ec9a2f8c 100644
--- a/tests/integration/body-sites.test.ts
+++ b/tests/integration/body-sites.test.ts
@@ -51,10 +51,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const OWNER_ID = "body-site-owner";
 const DELEGATE_ID = "body-site-delegate";
 
diff --git a/tests/integration/bp-in-target.test.ts b/tests/integration/bp-in-target.test.ts
index 5dac3ef43..45927342a 100644
--- a/tests/integration/bp-in-target.test.ts
+++ b/tests/integration/bp-in-target.test.ts
@@ -55,10 +55,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 beforeEach(async () => {
   await truncateAllTables(getPrismaClient());
   cookieJar.clear();
diff --git a/tests/integration/briefing-cache-locale.test.ts b/tests/integration/briefing-cache-locale.test.ts
index 8589571c3..6dffd1396 100644
--- a/tests/integration/briefing-cache-locale.test.ts
+++ b/tests/integration/briefing-cache-locale.test.ts
@@ -36,10 +36,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const BRIEFING = {
   greeting: "Good morning",
   paragraph: "Your readings this week stayed inside their usual range.",
diff --git a/tests/integration/bulk-delete-source-filter.test.ts b/tests/integration/bulk-delete-source-filter.test.ts
index 5ea9af473..a3056fbe1 100644
--- a/tests/integration/bulk-delete-source-filter.test.ts
+++ b/tests/integration/bulk-delete-source-filter.test.ts
@@ -41,10 +41,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 async function seedUser(id: string, username: string) {
   const prisma = getPrismaClient();
   await prisma.user.create({
diff --git a/tests/integration/bulk-writer-cache-invalidation.test.ts b/tests/integration/bulk-writer-cache-invalidation.test.ts
index 81ce584cc..6225069bd 100644
--- a/tests/integration/bulk-writer-cache-invalidation.test.ts
+++ b/tests/integration/bulk-writer-cache-invalidation.test.ts
@@ -35,9 +35,6 @@ import { sweepStaleSleepSegments } from "@/lib/sleep/sweep-stale-segments";
 
 import { getPrismaClient, truncateAllTables } from "./setup";
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("@/lib/jobs/boss-instance", () => ({
   getGlobalBoss: vi.fn(() => null),
 }));
diff --git a/tests/integration/cache-invalidation-coverage.test.ts b/tests/integration/cache-invalidation-coverage.test.ts
index 578463b94..821729db7 100644
--- a/tests/integration/cache-invalidation-coverage.test.ts
+++ b/tests/integration/cache-invalidation-coverage.test.ts
@@ -42,21 +42,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-// `ensureDbCompatibility` is intentionally LEFT REAL for this file —
-// the admin app-settings PUT touches the `app_settings` table whose
-// columns land via that helper rather than the migration set in
-// `prisma/migrations/`. Mocking it out (as the other integration tests
-// do for speed) would make the upsert reference a `default_locale`
-// column the test container doesn't carry. Letting the real helper
-// run inside the route handler keeps the schema consistent for the
-// admin-settings test case in this file.
-//
-// `isolate: false` in `vitest.integration.config.mts` shares module
-// state across files, so a sibling test file that mocks db-compat
-// would leak its mock here. The beforeEach below explicitly imports
-// the actual implementation through `vi.importActual` and runs it on
-// each test setup to defeat that bleed-through.
-
 const PRIMARY_USER_ID = "user-cache-invalidation-primary";
 const OTHER_USER_ID = "user-cache-invalidation-other";
 
@@ -98,12 +83,6 @@ beforeEach(async () => {
   headerJar.clear();
   const { __resetAllCachesForTests } = await import("@/lib/cache/server-cache");
   __resetAllCachesForTests();
-  // Run the real db-compat helper directly so a sibling test file's
-  // `vi.mock("@/lib/db-compat", ...)` cannot leave the `app_settings`
-  // table missing columns the admin-settings PUT writes through.
-  const realDbCompat =
-    await vi.importActual<typeof import("@/lib/db-compat")>("@/lib/db-compat");
-  await realDbCompat.ensureDbCompatibility();
   await seedUsers();
 });
 
diff --git a/tests/integration/changepoint-extended.test.ts b/tests/integration/changepoint-extended.test.ts
index d369dc6b6..536c9df0c 100644
--- a/tests/integration/changepoint-extended.test.ts
+++ b/tests/integration/changepoint-extended.test.ts
@@ -9,10 +9,6 @@ import { beforeEach, describe, expect, it, vi } from "vitest";
 import { getPrismaClient, truncateAllTables } from "./setup";
 import { buildExtendedChangepointSignals } from "@/lib/insights/derived/changepoint";
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const DAY_MS = 24 * 60 * 60 * 1000;
 
 function at(daysAgo: number): Date {
diff --git a/tests/integration/chart-all-range-meaning.test.ts b/tests/integration/chart-all-range-meaning.test.ts
index bfc406909..8f2400eaf 100644
--- a/tests/integration/chart-all-range-meaning.test.ts
+++ b/tests/integration/chart-all-range-meaning.test.ts
@@ -18,9 +18,6 @@ import { recomputeUserRollups } from "@/lib/rollups/measurement-rollups";
 import { bucketTimeSeries } from "@/lib/charts/bucket-time-series";
 import type { MeasurementType } from "@/generated/prisma/client";
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("@/lib/jobs/boss-instance", () => ({
   getGlobalBoss: vi.fn(() => null),
 }));
diff --git a/tests/integration/chart-overlay-prefs.test.ts b/tests/integration/chart-overlay-prefs.test.ts
index d86fe392e..93ff64412 100644
--- a/tests/integration/chart-overlay-prefs.test.ts
+++ b/tests/integration/chart-overlay-prefs.test.ts
@@ -40,10 +40,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 beforeEach(async () => {
   await truncateAllTables(getPrismaClient());
   cookieJar.clear();
diff --git a/tests/integration/chart-range-dense.test.ts b/tests/integration/chart-range-dense.test.ts
index 5e36f45cd..e7a39d9df 100644
--- a/tests/integration/chart-range-dense.test.ts
+++ b/tests/integration/chart-range-dense.test.ts
@@ -37,10 +37,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const USER = "chart-range-dense-user";
 const TZ = "Europe/Berlin";
 const TO = new Date("2026-09-20T18:00:00.000Z");
diff --git a/tests/integration/checkup-stays-due.test.ts b/tests/integration/checkup-stays-due.test.ts
index efb3a1fde..8c2dd23e9 100644
--- a/tests/integration/checkup-stays-due.test.ts
+++ b/tests/integration/checkup-stays-due.test.ts
@@ -29,10 +29,6 @@ import type { DispatchOutcome } from "@/lib/notifications/dispatcher";
 
 import { getPrismaClient, truncateAllTables } from "./setup";
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const MIGRATION = readFileSync(
   path.join(
     process.cwd(),
diff --git a/tests/integration/coach-availability-probe.test.ts b/tests/integration/coach-availability-probe.test.ts
index 4ea36eed0..6713eec3f 100644
--- a/tests/integration/coach-availability-probe.test.ts
+++ b/tests/integration/coach-availability-probe.test.ts
@@ -16,10 +16,6 @@ import { beforeEach, describe, expect, it, vi } from "vitest";
 import { getPrismaClient, truncateAllTables } from "./setup";
 import { probeCoachAvailability } from "@/lib/ai/coach/tools/availability";
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const NOW = new Date("2026-07-26T09:00:00Z");
 
 beforeEach(async () => {
diff --git a/tests/integration/coach-chat.test.ts b/tests/integration/coach-chat.test.ts
index 00c6cb523..0eb20b8af 100644
--- a/tests/integration/coach-chat.test.ts
+++ b/tests/integration/coach-chat.test.ts
@@ -47,10 +47,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 // Stub feature extraction so we don't need a full measurement seed.
 vi.mock("@/lib/insights/features", () => ({
   extractFeatures: vi.fn(async () => ({
diff --git a/tests/integration/coach-conversation-delete.test.ts b/tests/integration/coach-conversation-delete.test.ts
index 4216ab8d8..c46de55ef 100644
--- a/tests/integration/coach-conversation-delete.test.ts
+++ b/tests/integration/coach-conversation-delete.test.ts
@@ -34,10 +34,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 beforeEach(async () => {
   await truncateAllTables(getPrismaClient());
   cookieJar.clear();
diff --git a/tests/integration/coach-conversations.test.ts b/tests/integration/coach-conversations.test.ts
index 7ca67f8c5..41261eec0 100644
--- a/tests/integration/coach-conversations.test.ts
+++ b/tests/integration/coach-conversations.test.ts
@@ -37,10 +37,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 beforeEach(async () => {
   await truncateAllTables(getPrismaClient());
   cookieJar.clear();
diff --git a/tests/integration/coach-feedback.test.ts b/tests/integration/coach-feedback.test.ts
index af7f7daad..292f6103a 100644
--- a/tests/integration/coach-feedback.test.ts
+++ b/tests/integration/coach-feedback.test.ts
@@ -36,10 +36,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 beforeEach(async () => {
   await truncateAllTables(getPrismaClient());
   cookieJar.clear();
diff --git a/tests/integration/coach-history-reach.test.ts b/tests/integration/coach-history-reach.test.ts
index d32a45b0c..ad726dcdb 100644
--- a/tests/integration/coach-history-reach.test.ts
+++ b/tests/integration/coach-history-reach.test.ts
@@ -26,9 +26,6 @@ import { readCoachReach } from "@/lib/ai/coach/history-reach-read";
 import { UNBOUNDED_REACH } from "@/lib/ai/coach/history-reach";
 import { assembleTurnContext } from "@/lib/ai/coach/turn/context";
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("@/lib/jobs/boss-instance", () => ({
   getGlobalBoss: vi.fn(() => null),
 }));
diff --git a/tests/integration/coach-labs-history.test.ts b/tests/integration/coach-labs-history.test.ts
index 7273636d4..cf8ed571a 100644
--- a/tests/integration/coach-labs-history.test.ts
+++ b/tests/integration/coach-labs-history.test.ts
@@ -24,9 +24,6 @@ import {
 } from "@/lib/ai/coach/history-reach";
 import type { CoachLabsBlock } from "@/lib/ai/coach/labs-snapshot";
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("@/lib/jobs/boss-instance", () => ({
   getGlobalBoss: vi.fn(() => null),
 }));
diff --git a/tests/integration/coach-metric-table.test.ts b/tests/integration/coach-metric-table.test.ts
index 479725ea0..f1537ade2 100644
--- a/tests/integration/coach-metric-table.test.ts
+++ b/tests/integration/coach-metric-table.test.ts
@@ -26,9 +26,6 @@ import { executeCoachTool } from "@/lib/ai/coach/tools/executor";
 import { appendMessage, createConversation } from "@/lib/ai/coach/persistence";
 import type { CoachResultTable } from "@/lib/ai/coach/types";
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("@/lib/jobs/boss-instance", () => ({
   getGlobalBoss: vi.fn(() => null),
 }));
diff --git a/tests/integration/coach-prefs.test.ts b/tests/integration/coach-prefs.test.ts
index 38168275a..b5dc6a91e 100644
--- a/tests/integration/coach-prefs.test.ts
+++ b/tests/integration/coach-prefs.test.ts
@@ -39,10 +39,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 beforeEach(async () => {
   await truncateAllTables(getPrismaClient());
   cookieJar.clear();
diff --git a/tests/integration/coach-series-long-window.test.ts b/tests/integration/coach-series-long-window.test.ts
index f14546702..856444d19 100644
--- a/tests/integration/coach-series-long-window.test.ts
+++ b/tests/integration/coach-series-long-window.test.ts
@@ -33,9 +33,6 @@ import { getServerTranslator } from "@/lib/i18n/server-translator";
 import { pluralKey } from "@/lib/i18n/plural";
 import type { MeasurementType } from "@/generated/prisma/client";
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("@/lib/jobs/boss-instance", () => ({
   getGlobalBoss: vi.fn(() => null),
 }));
diff --git a/tests/integration/coach-stale-rollup-tail.test.ts b/tests/integration/coach-stale-rollup-tail.test.ts
index 60a579b4b..a9093dcfc 100644
--- a/tests/integration/coach-stale-rollup-tail.test.ts
+++ b/tests/integration/coach-stale-rollup-tail.test.ts
@@ -37,10 +37,6 @@ process.env.ENCRYPTION_KEY ??=
 
 import { getPrismaClient, truncateAllTables } from "./setup";
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 import { buildCoachSnapshot } from "@/lib/ai/coach/snapshot";
 import { recomputeUserRollups } from "@/lib/rollups/measurement-rollups";
 
diff --git a/tests/integration/coach-trail.test.ts b/tests/integration/coach-trail.test.ts
index 3878e6fdd..60f568d4d 100644
--- a/tests/integration/coach-trail.test.ts
+++ b/tests/integration/coach-trail.test.ts
@@ -36,10 +36,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 // Whether the record's Coach text may be shown is its own suite's question
 // (`ai-optional-*`); here it is a switch.
 vi.mock("@/lib/ai/capabilities/gate", async (importOriginal) => ({
diff --git a/tests/integration/codex-credential-park.test.ts b/tests/integration/codex-credential-park.test.ts
index 1eb6c4c8c..1857c5619 100644
--- a/tests/integration/codex-credential-park.test.ts
+++ b/tests/integration/codex-credential-park.test.ts
@@ -40,10 +40,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("@/lib/logging/signal", async (importOriginal) => {
   const actual = await importOriginal<typeof import("@/lib/logging/signal")>();
   return { ...actual, emitSignal: vi.fn(actual.emitSignal) };
diff --git a/tests/integration/compaction-tombstones.test.ts b/tests/integration/compaction-tombstones.test.ts
index a4afa1c42..d955dcbec 100644
--- a/tests/integration/compaction-tombstones.test.ts
+++ b/tests/integration/compaction-tombstones.test.ts
@@ -41,10 +41,6 @@ vi.mock("next/headers", async () => {
     })),
   };
 });
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const HOUR = 3_600_000;
 const DAY = 24 * HOUR;
 const NOW = Date.now();
diff --git a/tests/integration/correlation-extended-channels.test.ts b/tests/integration/correlation-extended-channels.test.ts
index 30c5c8bf0..9082e4440 100644
--- a/tests/integration/correlation-extended-channels.test.ts
+++ b/tests/integration/correlation-extended-channels.test.ts
@@ -17,10 +17,6 @@ import {
   fetchTrainingSeries,
 } from "@/lib/insights/correlation-channel-series";
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const DAY_MS = 24 * 60 * 60 * 1000;
 const TZ = "Europe/Berlin";
 
diff --git a/tests/integration/correlation-findings-before-seasonal-adjustment.test.ts b/tests/integration/correlation-findings-before-seasonal-adjustment.test.ts
index 91af5b9ee..b43a8b830 100644
--- a/tests/integration/correlation-findings-before-seasonal-adjustment.test.ts
+++ b/tests/integration/correlation-findings-before-seasonal-adjustment.test.ts
@@ -22,10 +22,6 @@ import {
   restoreProfileData,
 } from "@/lib/export/profile-backup";
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const DAY_MS = 24 * 60 * 60 * 1000;
 const MARKER = new Date("2026-10-08T00:00:00.000Z");
 const BEFORE = new Date(MARKER.getTime() - 30 * DAY_MS);
diff --git a/tests/integration/correlations-rollup-swap.test.ts b/tests/integration/correlations-rollup-swap.test.ts
index c160aa598..e27eba182 100644
--- a/tests/integration/correlations-rollup-swap.test.ts
+++ b/tests/integration/correlations-rollup-swap.test.ts
@@ -26,10 +26,6 @@ import { getPrismaClient, truncateAllTables } from "./setup";
 import { recomputeUserRollups } from "@/lib/rollups/measurement-rollups";
 import { fetchMeasurementDailySeriesTiered } from "@/lib/insights/correlation-channel-series";
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 // The DAY-only recompute never touches pg-boss; leave the boss detached for
 // parity with the sibling rollup suites (`isolate: false` shares the mock).
 vi.mock("@/lib/jobs/boss-instance", () => ({
diff --git a/tests/integration/credential-enrollment-proof.test.ts b/tests/integration/credential-enrollment-proof.test.ts
index 383b40a0c..78b94d0b3 100644
--- a/tests/integration/credential-enrollment-proof.test.ts
+++ b/tests/integration/credential-enrollment-proof.test.ts
@@ -41,10 +41,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const USER_ID = "user-enroll-proof";
 const PASSWORD = "Correct horse battery staple!42";
 const HOUR = 60 * 60 * 1000;
diff --git a/tests/integration/csv-import-contextless-glucose.test.ts b/tests/integration/csv-import-contextless-glucose.test.ts
index 9918bd2e0..8396162fb 100644
--- a/tests/integration/csv-import-contextless-glucose.test.ts
+++ b/tests/integration/csv-import-contextless-glucose.test.ts
@@ -43,10 +43,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const HEADER = "type,value,unit,measuredAt,glucoseContext,notes,externalId";
 
 async function signIn() {
diff --git a/tests/integration/csv-reimport-idempotent.test.ts b/tests/integration/csv-reimport-idempotent.test.ts
index f0e8d1621..16efd8cd9 100644
--- a/tests/integration/csv-reimport-idempotent.test.ts
+++ b/tests/integration/csv-reimport-idempotent.test.ts
@@ -36,10 +36,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const HEADER = "type,value,unit,measuredAt,glucoseContext,notes,externalId";
 const ROWS = 9000;
 
diff --git a/tests/integration/cumulative-pr-rederive-atomic.test.ts b/tests/integration/cumulative-pr-rederive-atomic.test.ts
index 77c8509a2..a6ed49f24 100644
--- a/tests/integration/cumulative-pr-rederive-atomic.test.ts
+++ b/tests/integration/cumulative-pr-rederive-atomic.test.ts
@@ -29,10 +29,6 @@ vi.mock("@/lib/personal-records/pr-detection-worker", async (importActual) => {
     },
   };
 });
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const { runCumulativePrRederivationForUser, CUMULATIVE_PR_FIX_CUTOFF } =
   await import("@/lib/personal-records/cumulative-pr-rederivation");
 
diff --git a/tests/integration/cycle-absorbed-restored.test.ts b/tests/integration/cycle-absorbed-restored.test.ts
index 0d807a61c..171f9a9e7 100644
--- a/tests/integration/cycle-absorbed-restored.test.ts
+++ b/tests/integration/cycle-absorbed-restored.test.ts
@@ -40,10 +40,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 beforeEach(async () => {
   await truncateAllTables(getPrismaClient());
   cookieJar.clear();
diff --git a/tests/integration/cycle-crosstab-day-aggregates.test.ts b/tests/integration/cycle-crosstab-day-aggregates.test.ts
index 43a04ef05..3c89c9b56 100644
--- a/tests/integration/cycle-crosstab-day-aggregates.test.ts
+++ b/tests/integration/cycle-crosstab-day-aggregates.test.ts
@@ -14,10 +14,6 @@ import { metricDayMap } from "@/lib/insights/mood-crosstab";
 import { PHASE_CROSSTAB_METRIC_TYPES } from "@/lib/cycle/phase-crosstab";
 import type { CrossMetricMeasurement } from "@/lib/insights/mood-aggregates";
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const prisma = getPrismaClient();
 const USER = "cycle-crosstab-agg";
 const SINCE = new Date("2026-06-01T00:00:00Z");
diff --git a/tests/integration/cycle-flow-opens-cycle.test.ts b/tests/integration/cycle-flow-opens-cycle.test.ts
index a77156ee0..e7eb32bc6 100644
--- a/tests/integration/cycle-flow-opens-cycle.test.ts
+++ b/tests/integration/cycle-flow-opens-cycle.test.ts
@@ -47,10 +47,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 async function loginAs(userId: string): Promise<void> {
   cookieJar.clear();
   headerJar.clear();
diff --git a/tests/integration/cycle-insights-dense-reads.test.ts b/tests/integration/cycle-insights-dense-reads.test.ts
index 545e1d24b..5facb4ed0 100644
--- a/tests/integration/cycle-insights-dense-reads.test.ts
+++ b/tests/integration/cycle-insights-dense-reads.test.ts
@@ -39,10 +39,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 /** When set, the fold is replaced by every raw reading as a one-row group. */
 const mode = vi.hoisted(() => ({ raw: false }));
 
diff --git a/tests/integration/cycle-insights-scoped-delegate.test.ts b/tests/integration/cycle-insights-scoped-delegate.test.ts
index 482afc6f5..ec908a677 100644
--- a/tests/integration/cycle-insights-scoped-delegate.test.ts
+++ b/tests/integration/cycle-insights-scoped-delegate.test.ts
@@ -47,10 +47,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const OWNER_ID = "cycle-insights-owner";
 const DELEGATE_ID = "cycle-insights-delegate";
 
diff --git a/tests/integration/cycle-routes.test.ts b/tests/integration/cycle-routes.test.ts
index d75c8822f..0dd4b29af 100644
--- a/tests/integration/cycle-routes.test.ts
+++ b/tests/integration/cycle-routes.test.ts
@@ -45,10 +45,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 async function loginAs(userId: string): Promise<void> {
   cookieJar.clear();
   headerJar.clear();
diff --git a/tests/integration/cycle-start-round-trip.test.ts b/tests/integration/cycle-start-round-trip.test.ts
index bbb458a1e..fcd7ccbaa 100644
--- a/tests/integration/cycle-start-round-trip.test.ts
+++ b/tests/integration/cycle-start-round-trip.test.ts
@@ -46,10 +46,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 async function loginAs(userId: string): Promise<void> {
   cookieJar.clear();
   headerJar.clear();
diff --git a/tests/integration/daily-digest-today-overview.test.ts b/tests/integration/daily-digest-today-overview.test.ts
index 844e73392..5b64beffa 100644
--- a/tests/integration/daily-digest-today-overview.test.ts
+++ b/tests/integration/daily-digest-today-overview.test.ts
@@ -19,10 +19,6 @@ import { PRIORITY_ITEM_KINDS } from "@/lib/daily/priority-item";
 
 import { getPrismaClient, truncateAllTables } from "./setup";
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const TZ = "Europe/Berlin";
 const DAY = 24 * 60 * 60 * 1000;
 // 08:00 in Berlin on a Sunday morning.
diff --git a/tests/integration/daily-series-user-tz.test.ts b/tests/integration/daily-series-user-tz.test.ts
index 4ae147839..7d55f2e75 100644
--- a/tests/integration/daily-series-user-tz.test.ts
+++ b/tests/integration/daily-series-user-tz.test.ts
@@ -28,10 +28,6 @@ import { invalidateUserTimezone } from "@/lib/tz/resolver";
 import { userDayKey } from "@/lib/tz/format";
 import { localHmAsUtc } from "@/lib/tz/local-day";
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 beforeEach(async () => {
   await truncateAllTables(getPrismaClient());
 });
diff --git a/tests/integration/dashboard-chart-overlay-concurrency.test.ts b/tests/integration/dashboard-chart-overlay-concurrency.test.ts
index 7ccf4b471..c42466c27 100644
--- a/tests/integration/dashboard-chart-overlay-concurrency.test.ts
+++ b/tests/integration/dashboard-chart-overlay-concurrency.test.ts
@@ -40,10 +40,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 beforeEach(async () => {
   await truncateAllTables(getPrismaClient());
   cookieJar.clear();
diff --git a/tests/integration/dashboard-glucose-untagged.test.ts b/tests/integration/dashboard-glucose-untagged.test.ts
index 810696cac..b8a501eed 100644
--- a/tests/integration/dashboard-glucose-untagged.test.ts
+++ b/tests/integration/dashboard-glucose-untagged.test.ts
@@ -40,10 +40,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 interface AnalyticsEnvelope {
   data: {
     glucoseByContext: Record<string, DataSummary> | null;
diff --git a/tests/integration/dashboard-own-target-bands.test.ts b/tests/integration/dashboard-own-target-bands.test.ts
index bc0c7994b..faae99863 100644
--- a/tests/integration/dashboard-own-target-bands.test.ts
+++ b/tests/integration/dashboard-own-target-bands.test.ts
@@ -40,10 +40,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 beforeEach(async () => {
   await truncateAllTables(getPrismaClient());
   cookieJar.clear();
diff --git a/tests/integration/dashboard-pulse-latest-day.test.ts b/tests/integration/dashboard-pulse-latest-day.test.ts
index 066e55f41..2ab6716ff 100644
--- a/tests/integration/dashboard-pulse-latest-day.test.ts
+++ b/tests/integration/dashboard-pulse-latest-day.test.ts
@@ -36,10 +36,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const prisma = getPrismaClient();
 const USER = "pulse-latest-day";
 const now = new Date();
diff --git a/tests/integration/dashboard-widgets-save.test.ts b/tests/integration/dashboard-widgets-save.test.ts
index f5e16f850..f0136a4f9 100644
--- a/tests/integration/dashboard-widgets-save.test.ts
+++ b/tests/integration/dashboard-widgets-save.test.ts
@@ -47,10 +47,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 beforeEach(async () => {
   await truncateAllTables(getPrismaClient());
   cookieJar.clear();
diff --git a/tests/integration/dawarich-context.test.ts b/tests/integration/dawarich-context.test.ts
index a0f8ddb1a..6cb4b905a 100644
--- a/tests/integration/dawarich-context.test.ts
+++ b/tests/integration/dawarich-context.test.ts
@@ -55,10 +55,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const USER_ID = "user-dawarich";
 const API_KEY = "dawarich-test-key";
 const HOME = 7;
diff --git a/tests/integration/day-view.test.ts b/tests/integration/day-view.test.ts
index 173db8466..94c2ef33f 100644
--- a/tests/integration/day-view.test.ts
+++ b/tests/integration/day-view.test.ts
@@ -39,10 +39,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 type Handler = (
   request: NextRequest,
   // eslint-disable-next-line @typescript-eslint/no-explicit-any
diff --git a/tests/integration/delegated-intake-notification.test.ts b/tests/integration/delegated-intake-notification.test.ts
index c5eb0c47e..311edfad0 100644
--- a/tests/integration/delegated-intake-notification.test.ts
+++ b/tests/integration/delegated-intake-notification.test.ts
@@ -50,10 +50,6 @@ vi.mock("@parse/node-apn", () => {
   return { default: { Provider, Notification }, Provider, Notification };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 import { getPrismaClient, truncateAllTables } from "./setup";
 
 const OWNER_ID = "user-delegated-intake-owner";
diff --git a/tests/integration/demo-mode-profile-write.test.ts b/tests/integration/demo-mode-profile-write.test.ts
index 5da3aa440..914e58d4f 100644
--- a/tests/integration/demo-mode-profile-write.test.ts
+++ b/tests/integration/demo-mode-profile-write.test.ts
@@ -42,10 +42,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 /** What the shared demo account carries before any visitor touches it. */
 const SEEDED = {
   username: "demo",
diff --git a/tests/integration/demo-seed-ai-texts.test.ts b/tests/integration/demo-seed-ai-texts.test.ts
index e4481f1c6..44c24ed66 100644
--- a/tests/integration/demo-seed-ai-texts.test.ts
+++ b/tests/integration/demo-seed-ai-texts.test.ts
@@ -38,10 +38,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 // A warm on the demo can only fail against the seeded placeholder key, so a
 // fresh seed must not ask for one.
 const enqueueForceWarm = vi.fn();
diff --git a/tests/integration/demo-seed-shape.test.ts b/tests/integration/demo-seed-shape.test.ts
index d7557b8bd..92099600f 100644
--- a/tests/integration/demo-seed-shape.test.ts
+++ b/tests/integration/demo-seed-shape.test.ts
@@ -22,10 +22,6 @@ import { beforeAll, describe, expect, it, vi } from "vitest";
 
 import { getPrismaClient, truncateAllTables } from "./setup";
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 let systolic: number[];
 let diastolic: number[];
 let means: number[];
diff --git a/tests/integration/demo-seed-sources.test.ts b/tests/integration/demo-seed-sources.test.ts
index 3841c61d9..81254beec 100644
--- a/tests/integration/demo-seed-sources.test.ts
+++ b/tests/integration/demo-seed-sources.test.ts
@@ -16,10 +16,6 @@ import { getPrismaClient, truncateAllTables } from "./setup";
 import { APPLE_HEALTH_TYPE_MAP } from "@/lib/measurements/apple-health-mapping";
 import { MEASURE_TYPE_MAP } from "@/lib/withings/client";
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const WITHINGS_TYPES = new Set(
   Object.values(MEASURE_TYPE_MAP).map((m) => m.type),
 );
diff --git a/tests/integration/dense-glucose-raw-window-series.test.ts b/tests/integration/dense-glucose-raw-window-series.test.ts
index ceb6991a6..21e704c13 100644
--- a/tests/integration/dense-glucose-raw-window-series.test.ts
+++ b/tests/integration/dense-glucose-raw-window-series.test.ts
@@ -48,10 +48,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const prisma = getPrismaClient();
 const TZ = "America/New_York";
 const DENSE = "dense-glucose-owner";
diff --git a/tests/integration/dense-pulse-raw-window-reads.test.ts b/tests/integration/dense-pulse-raw-window-reads.test.ts
index 886507ace..962443a52 100644
--- a/tests/integration/dense-pulse-raw-window-reads.test.ts
+++ b/tests/integration/dense-pulse-raw-window-reads.test.ts
@@ -48,10 +48,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const prisma = getPrismaClient();
 const TZ = "America/New_York";
 const DENSE = "dense-raw-window-owner";
diff --git a/tests/integration/dense-read-bounded.test.ts b/tests/integration/dense-read-bounded.test.ts
index a77ec520c..95821e82b 100644
--- a/tests/integration/dense-read-bounded.test.ts
+++ b/tests/integration/dense-read-bounded.test.ts
@@ -32,10 +32,6 @@ import { localHmAsUtc } from "@/lib/tz/local-day";
 import { dayValue } from "@/lib/measurements/day-mean";
 import { userDayKey } from "@/lib/tz/format";
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const prisma = getPrismaClient();
 const DENSE_USER = "dense-pulse-owner";
 const PARITY_USER = "dense-parity-owner";
diff --git a/tests/integration/dense-series-hrv-spo2.test.ts b/tests/integration/dense-series-hrv-spo2.test.ts
index 0145a4ae2..dca6f79fb 100644
--- a/tests/integration/dense-series-hrv-spo2.test.ts
+++ b/tests/integration/dense-series-hrv-spo2.test.ts
@@ -41,10 +41,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const prisma = getPrismaClient();
 const TZ = "Europe/Berlin";
 const DENSE = "dense-hrv-spo2-owner";
diff --git a/tests/integration/dense-targets-reads.test.ts b/tests/integration/dense-targets-reads.test.ts
index f2bf0c2ce..9fb0818c1 100644
--- a/tests/integration/dense-targets-reads.test.ts
+++ b/tests/integration/dense-targets-reads.test.ts
@@ -27,10 +27,6 @@ import { buildVitalTargets } from "@/lib/targets/vitals-builder";
 import { userDayKey } from "@/lib/tz/format";
 import { invalidateUserTimezone } from "@/lib/tz/resolver";
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const prisma = getPrismaClient();
 const TZ = "America/New_York";
 const DENSE = "dense-targets-owner";
diff --git a/tests/integration/device-register.test.ts b/tests/integration/device-register.test.ts
index eeaf368fe..2db21ac8e 100644
--- a/tests/integration/device-register.test.ts
+++ b/tests/integration/device-register.test.ts
@@ -44,10 +44,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 beforeEach(async () => {
   await truncateAllTables(getPrismaClient());
   cookieJar.clear();
diff --git a/tests/integration/doctor-report-fixed-window.test.ts b/tests/integration/doctor-report-fixed-window.test.ts
index e42ceb95c..321d892f9 100644
--- a/tests/integration/doctor-report-fixed-window.test.ts
+++ b/tests/integration/doctor-report-fixed-window.test.ts
@@ -17,10 +17,6 @@ import { selectionFromLeaves } from "@/lib/report-selection/selection";
 
 import { getPrismaClient, truncateAllTables } from "./setup";
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const RANGE = {
   start: new Date("2026-01-01T00:00:00.000Z"),
   end: new Date("2026-03-31T23:59:59.999Z"),
diff --git a/tests/integration/doctor-report-sections.test.ts b/tests/integration/doctor-report-sections.test.ts
index 197beaa68..8b857cf4d 100644
--- a/tests/integration/doctor-report-sections.test.ts
+++ b/tests/integration/doctor-report-sections.test.ts
@@ -48,10 +48,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 beforeEach(async () => {
   await truncateAllTables(getPrismaClient());
   cookieJar.clear();
diff --git a/tests/integration/document-ai-runs.test.ts b/tests/integration/document-ai-runs.test.ts
index 177493de2..9f2c94f8e 100644
--- a/tests/integration/document-ai-runs.test.ts
+++ b/tests/integration/document-ai-runs.test.ts
@@ -57,10 +57,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const queue = vi.hoisted(() => ({
   up: true,
   send: vi.fn(async () => "job-1"),
diff --git a/tests/integration/document-sources.test.ts b/tests/integration/document-sources.test.ts
index 7793fab8d..4c0209f66 100644
--- a/tests/integration/document-sources.test.ts
+++ b/tests/integration/document-sources.test.ts
@@ -49,10 +49,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 // ── The fake Paperless-ngx behind `safeFetch` ──────────────────────────────
 
 const ORIGIN = "http://paperless.lan:8000";
diff --git a/tests/integration/document-undated-lab-value.test.ts b/tests/integration/document-undated-lab-value.test.ts
index 154bb4619..6bdbcf2a0 100644
--- a/tests/integration/document-undated-lab-value.test.ts
+++ b/tests/integration/document-undated-lab-value.test.ts
@@ -42,10 +42,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 beforeEach(async () => {
   await truncateAllTables(getPrismaClient());
   cookieJar.clear();
diff --git a/tests/integration/documents-content-index.test.ts b/tests/integration/documents-content-index.test.ts
index 0436158f3..629b9ecda 100644
--- a/tests/integration/documents-content-index.test.ts
+++ b/tests/integration/documents-content-index.test.ts
@@ -37,10 +37,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const PNG_1X1 = Buffer.from(
   "iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR4nGNgYGBgAAAABQABXvMqOgAAAABJRU5ErkJggg==",
   "base64",
diff --git a/tests/integration/documents-import.test.ts b/tests/integration/documents-import.test.ts
index d6b82bcc7..67ef7398d 100644
--- a/tests/integration/documents-import.test.ts
+++ b/tests/integration/documents-import.test.ts
@@ -45,10 +45,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const PNG_1X1 = Buffer.from(
   "iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR4nGNgYGBgAAAABQABXvMqOgAAAABJRU5ErkJggg==",
   "base64",
diff --git a/tests/integration/documents-recently-deleted.test.ts b/tests/integration/documents-recently-deleted.test.ts
index 10e474589..6dc0028c9 100644
--- a/tests/integration/documents-recently-deleted.test.ts
+++ b/tests/integration/documents-recently-deleted.test.ts
@@ -40,10 +40,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const pdf = (tag: string) =>
   Buffer.from(`%PDF-1.7\n% ${tag}\n1 0 obj\n<<>>\nendobj\n%%EOF\n`);
 
diff --git a/tests/integration/documents-vault.test.ts b/tests/integration/documents-vault.test.ts
index 54abfc2aa..367c3a2db 100644
--- a/tests/integration/documents-vault.test.ts
+++ b/tests/integration/documents-vault.test.ts
@@ -54,10 +54,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const PNG_1X1 = Buffer.from(
   "iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR4nGNgYGBgAAAABQABXvMqOgAAAABJRU5ErkJggg==",
   "base64",
diff --git a/tests/integration/dose-history-pre-creation-slots.test.ts b/tests/integration/dose-history-pre-creation-slots.test.ts
index 3cf129004..49b9ffeb7 100644
--- a/tests/integration/dose-history-pre-creation-slots.test.ts
+++ b/tests/integration/dose-history-pre-creation-slots.test.ts
@@ -49,10 +49,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const DAY_MS = 24 * 60 * 60 * 1000;
 
 type Handler = (
diff --git a/tests/integration/ecg-ingest-roundtrip.test.ts b/tests/integration/ecg-ingest-roundtrip.test.ts
index 24ac2f631..c2f568e4c 100644
--- a/tests/integration/ecg-ingest-roundtrip.test.ts
+++ b/tests/integration/ecg-ingest-roundtrip.test.ts
@@ -41,10 +41,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 import {
   GET as getEcgList,
   POST as postEcg,
diff --git a/tests/integration/emergency-profile-route.test.ts b/tests/integration/emergency-profile-route.test.ts
index 1a275fdab..f5cbdc20a 100644
--- a/tests/integration/emergency-profile-route.test.ts
+++ b/tests/integration/emergency-profile-route.test.ts
@@ -38,10 +38,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 async function loginAs(userId: string): Promise<void> {
   cookieJar.clear();
   headerJar.clear();
diff --git a/tests/integration/encounter-appointment-reminder.test.ts b/tests/integration/encounter-appointment-reminder.test.ts
index 2ae3e692f..388f971cb 100644
--- a/tests/integration/encounter-appointment-reminder.test.ts
+++ b/tests/integration/encounter-appointment-reminder.test.ts
@@ -42,10 +42,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const OWNER_ID = "appointment-owner";
 
 /** Far enough out that the appointment is still in the future mid-run. */
diff --git a/tests/integration/encounter-phase2-surfaces.test.ts b/tests/integration/encounter-phase2-surfaces.test.ts
index 7e3e5687f..c58aa34e7 100644
--- a/tests/integration/encounter-phase2-surfaces.test.ts
+++ b/tests/integration/encounter-phase2-surfaces.test.ts
@@ -46,10 +46,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const OWNER_ID = "phase2-owner";
 
 function daysFromNow(days: number): Date {
diff --git a/tests/integration/encounter-preparation.test.ts b/tests/integration/encounter-preparation.test.ts
index 02c6a628e..a269c1f72 100644
--- a/tests/integration/encounter-preparation.test.ts
+++ b/tests/integration/encounter-preparation.test.ts
@@ -37,10 +37,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const OWNER_ID = "prep-owner";
 const DAY_MS = 24 * 60 * 60 * 1000;
 
diff --git a/tests/integration/encounter-procedures.test.ts b/tests/integration/encounter-procedures.test.ts
index 036aa2416..465b97856 100644
--- a/tests/integration/encounter-procedures.test.ts
+++ b/tests/integration/encounter-procedures.test.ts
@@ -59,10 +59,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const OWNER_ID = "procedures-owner";
 const STRANGER_ID = "procedures-stranger";
 
diff --git a/tests/integration/encounter-scoped-delegate.test.ts b/tests/integration/encounter-scoped-delegate.test.ts
index c00a22c58..3fb8d713c 100644
--- a/tests/integration/encounter-scoped-delegate.test.ts
+++ b/tests/integration/encounter-scoped-delegate.test.ts
@@ -49,10 +49,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const OWNER_ID = "scoped-visit-owner";
 const DELEGATE_ID = "scoped-visit-delegate";
 
diff --git a/tests/integration/encryption-key-check.test.ts b/tests/integration/encryption-key-check.test.ts
index 7e4700609..f9cb6c3fd 100644
--- a/tests/integration/encryption-key-check.test.ts
+++ b/tests/integration/encryption-key-check.test.ts
@@ -39,10 +39,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 /**
  * The start-up probe is bounded in time on purpose: ten seconds in all and
  * two per query, so a host with a huge table still starts. Those bounds are
diff --git a/tests/integration/environment-air-quality-history.test.ts b/tests/integration/environment-air-quality-history.test.ts
index 26ef059c2..87e7c32dd 100644
--- a/tests/integration/environment-air-quality-history.test.ts
+++ b/tests/integration/environment-air-quality-history.test.ts
@@ -29,10 +29,6 @@ import { openLocation, sealLocation } from "@/lib/environment/location-cipher";
 import { handleEnvironmentAqHistory } from "@/lib/jobs/environment-air-quality-history";
 import { getPrismaClient, truncateAllTables } from "./setup";
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const OWNER = "aq-history-owner";
 const NOW = new Date("2026-10-09T03:00:00Z");
 const BOCHUM = { lat: 51.5, lon: 7.2, label: "Bochum" };
diff --git a/tests/integration/environment-coarse-location.test.ts b/tests/integration/environment-coarse-location.test.ts
index 07e753ae9..53a31d8cb 100644
--- a/tests/integration/environment-coarse-location.test.ts
+++ b/tests/integration/environment-coarse-location.test.ts
@@ -43,10 +43,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const OWNER_ID = "environment-coarse-owner";
 
 function jsonRequest(url: string, method: string, body: unknown) {
diff --git a/tests/integration/environment-location-encryption.test.ts b/tests/integration/environment-location-encryption.test.ts
index 79251745e..76b18b1b9 100644
--- a/tests/integration/environment-location-encryption.test.ts
+++ b/tests/integration/environment-location-encryption.test.ts
@@ -53,10 +53,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const OWNER = "env-sealed-owner";
 
 function jsonRequest(url: string, method: string, body: unknown) {
diff --git a/tests/integration/environment-setup.ts b/tests/integration/environment-setup.ts
index ac64aff72..078fd12c7 100644
--- a/tests/integration/environment-setup.ts
+++ b/tests/integration/environment-setup.ts
@@ -78,10 +78,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 /**
  * The same pin the unit setup applies (see `vitest.setup.ts`): the Fitbit
  * suites run before the Web API turndown, whatever the real date, and a test
diff --git a/tests/integration/export-per-type.test.ts b/tests/integration/export-per-type.test.ts
index 6b7b2ed08..15261893d 100644
--- a/tests/integration/export-per-type.test.ts
+++ b/tests/integration/export-per-type.test.ts
@@ -44,10 +44,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 beforeEach(async () => {
   await truncateAllTables(getPrismaClient());
   cookieJar.clear();
diff --git a/tests/integration/fitbit-retirement.test.ts b/tests/integration/fitbit-retirement.test.ts
index b75f0d2b3..087161cd1 100644
--- a/tests/integration/fitbit-retirement.test.ts
+++ b/tests/integration/fitbit-retirement.test.ts
@@ -9,9 +9,6 @@ import { beforeEach, describe, expect, it, vi } from "vitest";
 
 import { getPrismaClient, truncateAllTables } from "./setup";
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("@/lib/notifications/dispatcher", () => ({
   dispatchNotification: vi.fn().mockResolvedValue({
     dispatched: true,
diff --git a/tests/integration/fold-complete-windows.test.ts b/tests/integration/fold-complete-windows.test.ts
index 24ce9a024..9064bb4c9 100644
--- a/tests/integration/fold-complete-windows.test.ts
+++ b/tests/integration/fold-complete-windows.test.ts
@@ -49,10 +49,6 @@ vi.mock("next/headers", async () => {
     })),
   };
 });
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const WS_HK = "HKQuantityTypeIdentifierWalkingSpeed";
 const HRV_HK = "HKQuantityTypeIdentifierHeartRateVariabilitySDNN";
 const HR_HK = "HKQuantityTypeIdentifierHeartRate";
diff --git a/tests/integration/fold-horizon.test.ts b/tests/integration/fold-horizon.test.ts
index f0f6d72b2..5169e538b 100644
--- a/tests/integration/fold-horizon.test.ts
+++ b/tests/integration/fold-horizon.test.ts
@@ -18,10 +18,6 @@ import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
 
 import { getPrismaClient, truncateAllTables } from "./setup";
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const WS_HK = "HKQuantityTypeIdentifierWalkingSpeed";
 const HRV_HK = "HKQuantityTypeIdentifierHeartRateVariabilitySDNN";
 
diff --git a/tests/integration/fold-leftover-provenance.test.ts b/tests/integration/fold-leftover-provenance.test.ts
index 34052920f..2833e05c6 100644
--- a/tests/integration/fold-leftover-provenance.test.ts
+++ b/tests/integration/fold-leftover-provenance.test.ts
@@ -17,10 +17,6 @@ import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
 
 import { getPrismaClient, truncateAllTables } from "./setup";
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const WS_HK = "HKQuantityTypeIdentifierWalkingSpeed";
 const HRV_HK = "HKQuantityTypeIdentifierHeartRateVariabilitySDNN";
 
diff --git a/tests/integration/full-backup-nutrients.test.ts b/tests/integration/full-backup-nutrients.test.ts
index 84e0b713d..27730abdb 100644
--- a/tests/integration/full-backup-nutrients.test.ts
+++ b/tests/integration/full-backup-nutrients.test.ts
@@ -36,10 +36,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 beforeEach(async () => {
   await truncateAllTables(getPrismaClient());
   cookieJar.clear();
diff --git a/tests/integration/golden-backups.test.ts b/tests/integration/golden-backups.test.ts
index a1cee3be6..e9d7d4a7f 100644
--- a/tests/integration/golden-backups.test.ts
+++ b/tests/integration/golden-backups.test.ts
@@ -60,10 +60,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const FIXTURE_DIR = resolve(__dirname, "../fixtures/golden-backups");
 const WRITE = process.env.GOLDEN_BACKUP_WRITE === "1";
 const SLOW = 240_000;
diff --git a/tests/integration/google-health-account-id.test.ts b/tests/integration/google-health-account-id.test.ts
index 07bfd9332..854e5a597 100644
--- a/tests/integration/google-health-account-id.test.ts
+++ b/tests/integration/google-health-account-id.test.ts
@@ -44,10 +44,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("@/lib/jobs/boss-ready", () => ({
   enqueueWhenBossReady: vi.fn().mockResolvedValue("skipped"),
 }));
diff --git a/tests/integration/google-health-backfill-multi-year.test.ts b/tests/integration/google-health-backfill-multi-year.test.ts
index b45003c83..659042467 100644
--- a/tests/integration/google-health-backfill-multi-year.test.ts
+++ b/tests/integration/google-health-backfill-multi-year.test.ts
@@ -259,10 +259,6 @@ vi.mock("@/lib/logging/transports", async (importOriginal) => ({
   },
 }));
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const forceGc = ((): (() => void) => {
   v8.setFlagsFromString("--expose-gc");
   const gc = vm.runInNewContext("gc") as () => void;
diff --git a/tests/integration/google-health-backfill-progress-bound.test.ts b/tests/integration/google-health-backfill-progress-bound.test.ts
index ac40e43d1..c4d983d5f 100644
--- a/tests/integration/google-health-backfill-progress-bound.test.ts
+++ b/tests/integration/google-health-backfill-progress-bound.test.ts
@@ -137,10 +137,6 @@ vi.mock("@/lib/jobs/boss-instance", async (importOriginal) => ({
   }),
 }));
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const OTHER_COLLECTIONS = [
   "fetchSteps",
   "fetchDistance",
diff --git a/tests/integration/google-health-backfill-rate-limit.test.ts b/tests/integration/google-health-backfill-rate-limit.test.ts
index 457a00d0c..1451a91b7 100644
--- a/tests/integration/google-health-backfill-rate-limit.test.ts
+++ b/tests/integration/google-health-backfill-rate-limit.test.ts
@@ -195,10 +195,6 @@ vi.mock("@/lib/jobs/boss-instance", async (importOriginal) => ({
   }),
 }));
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 async function seed(): Promise<void> {
   const prisma = getPrismaClient();
   await truncateAllTables(prisma);
diff --git a/tests/integration/google-health-dense-backfill-memory.test.ts b/tests/integration/google-health-dense-backfill-memory.test.ts
index 51af6c4b4..8297ec954 100644
--- a/tests/integration/google-health-dense-backfill-memory.test.ts
+++ b/tests/integration/google-health-dense-backfill-memory.test.ts
@@ -105,10 +105,6 @@ vi.mock("@/lib/safe-fetch", async (importOriginal) => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const forceGc = ((): (() => void) => {
   v8.setFlagsFromString("--expose-gc");
   const gc = vm.runInNewContext("gc") as () => void;
diff --git a/tests/integration/google-health-sleep-overlap.test.ts b/tests/integration/google-health-sleep-overlap.test.ts
index ebc1e1e6a..1cfa1ddfd 100644
--- a/tests/integration/google-health-sleep-overlap.test.ts
+++ b/tests/integration/google-health-sleep-overlap.test.ts
@@ -49,10 +49,6 @@ vi.mock("@/lib/safe-fetch", async (importOriginal) => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 /** The night under test: 22:00 UTC two days ago to 06:00 UTC yesterday. */
 const NIGHT_START = (() => {
   const d = new Date();
diff --git a/tests/integration/health-connect-import.test.ts b/tests/integration/health-connect-import.test.ts
index 3c965acac..d2d10c3f3 100644
--- a/tests/integration/health-connect-import.test.ts
+++ b/tests/integration/health-connect-import.test.ts
@@ -42,10 +42,6 @@ import {
   reconcileOrphanImportJobs,
 } from "@/lib/jobs/apple-health-import-worker";
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const bossMock = vi.hoisted(() => ({
   handle: null as null | {
     getJobById: (queue: string, id: string) => Promise<unknown>;
diff --git a/tests/integration/health-score-configured-flag.test.ts b/tests/integration/health-score-configured-flag.test.ts
index 91a556b29..97b3d2ee5 100644
--- a/tests/integration/health-score-configured-flag.test.ts
+++ b/tests/integration/health-score-configured-flag.test.ts
@@ -59,10 +59,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 // The provider read touches an `app_settings` column that trails the
 // production schema in this environment, and no surface under test needs
 // a provider: the digest lifts a cached briefing, it never generates one.
diff --git a/tests/integration/health-score-labs-pillars.test.ts b/tests/integration/health-score-labs-pillars.test.ts
index 00c1be13a..af2f34614 100644
--- a/tests/integration/health-score-labs-pillars.test.ts
+++ b/tests/integration/health-score-labs-pillars.test.ts
@@ -50,10 +50,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 beforeEach(async () => {
   await truncateAllTables(getPrismaClient());
   cookieJar.clear();
diff --git a/tests/integration/health-score-record.test.ts b/tests/integration/health-score-record.test.ts
index 53a49120b..d0a55a25b 100644
--- a/tests/integration/health-score-record.test.ts
+++ b/tests/integration/health-score-record.test.ts
@@ -60,10 +60,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("@/lib/cache/invalidate", () => ({
   invalidateUserData: vi.fn(),
   invalidateUserHealthScore: vi.fn(),
diff --git a/tests/integration/health-status-implausible-values.test.ts b/tests/integration/health-status-implausible-values.test.ts
index 282ed03c2..e4c093910 100644
--- a/tests/integration/health-status-implausible-values.test.ts
+++ b/tests/integration/health-status-implausible-values.test.ts
@@ -38,10 +38,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const DAY_MS = 24 * 60 * 60 * 1000;
 /** The two numbers off the report, kept verbatim so the case stays legible. */
 const IMPOSSIBLE_PULSE = 111287531.01;
diff --git a/tests/integration/healthkit-type-sync.test.ts b/tests/integration/healthkit-type-sync.test.ts
index fd8dd5455..9e403b194 100644
--- a/tests/integration/healthkit-type-sync.test.ts
+++ b/tests/integration/healthkit-type-sync.test.ts
@@ -44,10 +44,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 beforeEach(async () => {
   await truncateAllTables(getPrismaClient());
   cookieJar.clear();
diff --git a/tests/integration/hour-buckets-and-backfill.test.ts b/tests/integration/hour-buckets-and-backfill.test.ts
index 299b76dfa..30c396c12 100644
--- a/tests/integration/hour-buckets-and-backfill.test.ts
+++ b/tests/integration/hour-buckets-and-backfill.test.ts
@@ -38,10 +38,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 beforeEach(async () => {
   await truncateAllTables(getPrismaClient());
   cookieJar.clear();
diff --git a/tests/integration/hrv-rmssd-fitbit-google-migration.test.ts b/tests/integration/hrv-rmssd-fitbit-google-migration.test.ts
index cbbadf508..8e2742407 100644
--- a/tests/integration/hrv-rmssd-fitbit-google-migration.test.ts
+++ b/tests/integration/hrv-rmssd-fitbit-google-migration.test.ts
@@ -15,9 +15,6 @@ import type { Prisma } from "@/generated/prisma/client";
 import { enqueueBootTimeRollupBackfill } from "@/lib/rollups/full-backfill";
 import { recomputeUserRollups } from "@/lib/rollups/measurement-rollups";
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("@/lib/jobs/boss-instance", () => ({
   getGlobalBoss: vi.fn(() => null),
 }));
diff --git a/tests/integration/hrv-rmssd-ingest.test.ts b/tests/integration/hrv-rmssd-ingest.test.ts
index 47a932972..ce7e482a7 100644
--- a/tests/integration/hrv-rmssd-ingest.test.ts
+++ b/tests/integration/hrv-rmssd-ingest.test.ts
@@ -38,10 +38,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 beforeEach(async () => {
   await truncateAllTables(getPrismaClient());
   cookieJar.clear();
diff --git a/tests/integration/idempotency-body-fingerprint.test.ts b/tests/integration/idempotency-body-fingerprint.test.ts
index c0d04d93c..ebc26eedb 100644
--- a/tests/integration/idempotency-body-fingerprint.test.ts
+++ b/tests/integration/idempotency-body-fingerprint.test.ts
@@ -46,10 +46,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const USER_A = "idem-fingerprint-a";
 const USER_B = "idem-fingerprint-b";
 const KEY = "bp-entry-5c1e2a7f";
diff --git a/tests/integration/idempotency-record-scoped-cell.test.ts b/tests/integration/idempotency-record-scoped-cell.test.ts
index 9fc440c9b..d1b5a41da 100644
--- a/tests/integration/idempotency-record-scoped-cell.test.ts
+++ b/tests/integration/idempotency-record-scoped-cell.test.ts
@@ -41,10 +41,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 import {
   ACCOUNT_SELECTOR_HEADER,
   apiHandler,
diff --git a/tests/integration/idempotency-replay.test.ts b/tests/integration/idempotency-replay.test.ts
index 567760834..a8b243060 100644
--- a/tests/integration/idempotency-replay.test.ts
+++ b/tests/integration/idempotency-replay.test.ts
@@ -41,10 +41,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 beforeEach(async () => {
   await truncateAllTables(getPrismaClient());
   cookieJar.clear();
diff --git a/tests/integration/insights-comprehensive-cache.test.ts b/tests/integration/insights-comprehensive-cache.test.ts
index fec430c3d..84f7f5f11 100644
--- a/tests/integration/insights-comprehensive-cache.test.ts
+++ b/tests/integration/insights-comprehensive-cache.test.ts
@@ -41,10 +41,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 // `resolveProvider` reads `app_settings.default_locale` which trails the
 // production schema in this integration env. Mock the leaf: the route
 // only uses `provider.type !== "none"` to set the `hasProvider` flag.
diff --git a/tests/integration/insights-feedback.test.ts b/tests/integration/insights-feedback.test.ts
index d6c233a25..1b5173466 100644
--- a/tests/integration/insights-feedback.test.ts
+++ b/tests/integration/insights-feedback.test.ts
@@ -39,10 +39,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 beforeEach(async () => {
   await truncateAllTables(getPrismaClient());
   cookieJar.clear();
diff --git a/tests/integration/insights-provider-chain-put.test.ts b/tests/integration/insights-provider-chain-put.test.ts
index d3ac5aba3..c4ad6a292 100644
--- a/tests/integration/insights-provider-chain-put.test.ts
+++ b/tests/integration/insights-provider-chain-put.test.ts
@@ -43,10 +43,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 beforeEach(async () => {
   await truncateAllTables(getPrismaClient());
   cookieJar.clear();
diff --git a/tests/integration/insights-provider-chain.test.ts b/tests/integration/insights-provider-chain.test.ts
index 017d27094..1fccdc3cc 100644
--- a/tests/integration/insights-provider-chain.test.ts
+++ b/tests/integration/insights-provider-chain.test.ts
@@ -42,10 +42,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 // safeFetch's requirePublicHost path runs through undici's own `fetch`
 // (version-locked with its dispatcher) rather than the global. Delegate it to
 // the global `fetch` spy these tests install so the provider HTTP is mocked.
diff --git a/tests/integration/insights-status-real-text.test.ts b/tests/integration/insights-status-real-text.test.ts
index c0f9c3517..a4ac51be7 100644
--- a/tests/integration/insights-status-real-text.test.ts
+++ b/tests/integration/insights-status-real-text.test.ts
@@ -18,10 +18,6 @@ import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
 
 import { getPrismaClient, truncateAllTables } from "./setup";
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 // Stub the provider resolution so the chain runner has a deterministic
 // provider to walk. `runRawCompletionWithFallback` runs for real on top
 // of this — exercising the same plumbing the live status path uses.
diff --git a/tests/integration/intake-backfill-missed-slot.test.ts b/tests/integration/intake-backfill-missed-slot.test.ts
index c4b613ffa..3e8aa837f 100644
--- a/tests/integration/intake-backfill-missed-slot.test.ts
+++ b/tests/integration/intake-backfill-missed-slot.test.ts
@@ -45,10 +45,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const TZ = "Europe/Berlin";
 const DAY_MS = 24 * 60 * 60 * 1000;
 
diff --git a/tests/integration/intake-late-take-future-slot.test.ts b/tests/integration/intake-late-take-future-slot.test.ts
index 797d809d3..673405c4e 100644
--- a/tests/integration/intake-late-take-future-slot.test.ts
+++ b/tests/integration/intake-late-take-future-slot.test.ts
@@ -38,10 +38,6 @@ import { localHmAsUtc } from "@/lib/tz/local-day";
 const TEST_USER_ID = "user-late-take-future-slot";
 const TZ = "Europe/Berlin";
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 // Fixed non-DST-boundary weekday so the slot instants are deterministic.
 const DAY = new Date("2026-03-10T12:00:00.000Z");
 const slot0900 = () => localHmAsUtc(DAY, TZ, 9, 0);
diff --git a/tests/integration/intake-scheduled-for-targeting.test.ts b/tests/integration/intake-scheduled-for-targeting.test.ts
index 9fe820313..e6dcba33a 100644
--- a/tests/integration/intake-scheduled-for-targeting.test.ts
+++ b/tests/integration/intake-scheduled-for-targeting.test.ts
@@ -28,10 +28,6 @@ import { localHmAsUtc } from "@/lib/tz/local-day";
 
 const TEST_USER_ID = "user-intake-scheduledfor-targeting";
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 beforeEach(async () => {
   const prisma = getPrismaClient();
   await truncateAllTables(prisma);
diff --git a/tests/integration/intake-slot-dedup.test.ts b/tests/integration/intake-slot-dedup.test.ts
index 57da5c2a0..d35b9114e 100644
--- a/tests/integration/intake-slot-dedup.test.ts
+++ b/tests/integration/intake-slot-dedup.test.ts
@@ -34,10 +34,6 @@ import { localHmAsUtc } from "@/lib/tz/local-day";
 const TEST_USER_ID = "user-intake-slot-dedup";
 const OTHER_USER_ID = "user-intake-slot-dedup-clean";
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 beforeEach(async () => {
   const prisma = getPrismaClient();
   await truncateAllTables(prisma);
diff --git a/tests/integration/integration-status.test.ts b/tests/integration/integration-status.test.ts
index 39198b593..6b08f217e 100644
--- a/tests/integration/integration-status.test.ts
+++ b/tests/integration/integration-status.test.ts
@@ -22,10 +22,6 @@ process.env.ENCRYPTION_KEY ??=
 
 import { getPrismaClient, truncateAllTables } from "./setup";
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 // The dispatcher would otherwise try to read encrypted channel
 // configs and call sendViaTelegram. We're not testing that path —
 // B3 owns it. Stub returns void so the helper's await chain
diff --git a/tests/integration/integration-sync-escalation.test.ts b/tests/integration/integration-sync-escalation.test.ts
index f39a66614..8423e5ec7 100644
--- a/tests/integration/integration-sync-escalation.test.ts
+++ b/tests/integration/integration-sync-escalation.test.ts
@@ -26,10 +26,6 @@ process.env.ENCRYPTION_KEY ??=
 
 import { getPrismaClient, truncateAllTables } from "./setup";
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("@/lib/logging/signal", async (importOriginal) => {
   const actual = await importOriginal<typeof import("@/lib/logging/signal")>();
   return { ...actual, emitSignal: vi.fn(actual.emitSignal) };
diff --git a/tests/integration/integration-watchdog.test.ts b/tests/integration/integration-watchdog.test.ts
index 777e3ce80..d31115bd0 100644
--- a/tests/integration/integration-watchdog.test.ts
+++ b/tests/integration/integration-watchdog.test.ts
@@ -14,10 +14,6 @@ process.env.ENCRYPTION_KEY ??=
 
 import { getPrismaClient, truncateAllTables } from "./setup";
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("@/lib/notifications/dispatcher", () => ({
   dispatchNotification: vi.fn().mockResolvedValue({
     dispatched: true,
diff --git a/tests/integration/lab-source-reference-range.test.ts b/tests/integration/lab-source-reference-range.test.ts
index 7cb112060..2591a63ea 100644
--- a/tests/integration/lab-source-reference-range.test.ts
+++ b/tests/integration/lab-source-reference-range.test.ts
@@ -47,10 +47,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 beforeEach(async () => {
   await truncateAllTables(getPrismaClient());
   cookieJar.clear();
diff --git a/tests/integration/lab-unit-mismatch.test.ts b/tests/integration/lab-unit-mismatch.test.ts
index 06a926202..abe0c670e 100644
--- a/tests/integration/lab-unit-mismatch.test.ts
+++ b/tests/integration/lab-unit-mismatch.test.ts
@@ -46,10 +46,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 beforeEach(async () => {
   await truncateAllTables(getPrismaClient());
   cookieJar.clear();
diff --git a/tests/integration/labs-analyte-key.test.ts b/tests/integration/labs-analyte-key.test.ts
index 0e17970ff..ca6c4b9fb 100644
--- a/tests/integration/labs-analyte-key.test.ts
+++ b/tests/integration/labs-analyte-key.test.ts
@@ -42,10 +42,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const prisma = getPrismaClient();
 const USER = "analyte-key-user";
 
diff --git a/tests/integration/labs-overview-long-history.test.ts b/tests/integration/labs-overview-long-history.test.ts
index bf0bbaa6c..35c6704f8 100644
--- a/tests/integration/labs-overview-long-history.test.ts
+++ b/tests/integration/labs-overview-long-history.test.ts
@@ -38,10 +38,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 /** Days before now, so the fixture never ages out of its own windows. */
 const daysAgo = (days: number) => new Date(Date.now() - days * DAY_MS);
 
diff --git a/tests/integration/labs-unit-conversion.test.ts b/tests/integration/labs-unit-conversion.test.ts
index 89af81ce8..6ff07e615 100644
--- a/tests/integration/labs-unit-conversion.test.ts
+++ b/tests/integration/labs-unit-conversion.test.ts
@@ -41,10 +41,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const prisma = getPrismaClient();
 const USER = "lab-conversion-user";
 const MGDL_PER_MMOL = 18.0182;
diff --git a/tests/integration/large-account-google-health.test.ts b/tests/integration/large-account-google-health.test.ts
index 630a2898b..5faa85235 100644
--- a/tests/integration/large-account-google-health.test.ts
+++ b/tests/integration/large-account-google-health.test.ts
@@ -74,10 +74,6 @@ vi.mock("@/lib/safe-fetch", async (importOriginal) => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("@/lib/jobs/boss-instance", () => ({
   getGlobalBoss: vi.fn(() => null),
 }));
diff --git a/tests/integration/large-backup-round-trip.test.ts b/tests/integration/large-backup-round-trip.test.ts
index 13276e15c..33a58165c 100644
--- a/tests/integration/large-backup-round-trip.test.ts
+++ b/tests/integration/large-backup-round-trip.test.ts
@@ -49,10 +49,6 @@ vi.mock("next/headers", async () => {
     })),
   };
 });
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const COUNT = 7_300; // more than one read page and several write batches
 
 beforeEach(async () => {
diff --git a/tests/integration/life-circumstances.test.ts b/tests/integration/life-circumstances.test.ts
index 508c8a53c..2a738add8 100644
--- a/tests/integration/life-circumstances.test.ts
+++ b/tests/integration/life-circumstances.test.ts
@@ -35,10 +35,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 type Handler = (request: Request, ctx?: unknown) => Promise<Response>;
 
 let counter = 0;
diff --git a/tests/integration/list-pagination-tiebreaker.test.ts b/tests/integration/list-pagination-tiebreaker.test.ts
index 171aa9aad..3f4336989 100644
--- a/tests/integration/list-pagination-tiebreaker.test.ts
+++ b/tests/integration/list-pagination-tiebreaker.test.ts
@@ -48,10 +48,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 /**
  * Insertion order deliberately unrelated to id order: 04, 09, 01, 06, 00, …
  * A scan that ignores the secondary key returns this sequence; one that
diff --git a/tests/integration/local-day-keys.test.ts b/tests/integration/local-day-keys.test.ts
index 5f9d2e5ef..4b9d4e50b 100644
--- a/tests/integration/local-day-keys.test.ts
+++ b/tests/integration/local-day-keys.test.ts
@@ -14,10 +14,6 @@ import { getPrismaClient, truncateAllTables } from "./setup";
 import { readActivityDayKeys } from "@/lib/dashboard/summary-reads";
 import { userDayKey } from "@/lib/tz/format";
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const prisma = getPrismaClient();
 const USER = "local-day-keys";
 const now = new Date();
diff --git a/tests/integration/login-insecure-transport.test.ts b/tests/integration/login-insecure-transport.test.ts
index c23df31ba..f675eceb7 100644
--- a/tests/integration/login-insecure-transport.test.ts
+++ b/tests/integration/login-insecure-transport.test.ts
@@ -42,10 +42,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const { hashPassword } = await import("@/lib/auth/password");
 const { encrypt } = await import("@/lib/crypto");
 const { generateTotpSecret } = await import("@/lib/auth/mfa/totp");
diff --git a/tests/integration/managed-profile-edit.test.ts b/tests/integration/managed-profile-edit.test.ts
index afb9fdcf0..0f905bc28 100644
--- a/tests/integration/managed-profile-edit.test.ts
+++ b/tests/integration/managed-profile-edit.test.ts
@@ -48,10 +48,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 let sequence = 0;
 
 interface Person {
diff --git a/tests/integration/managed-profile-handover-sso.test.ts b/tests/integration/managed-profile-handover-sso.test.ts
index 842e9e8c7..2beab6343 100644
--- a/tests/integration/managed-profile-handover-sso.test.ts
+++ b/tests/integration/managed-profile-handover-sso.test.ts
@@ -54,10 +54,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("@/lib/password-breach-check", () => ({
   checkPasswordBreachIfEnabled: vi.fn().mockResolvedValue(null),
 }));
diff --git a/tests/integration/managed-profile-handover-stepup-sso.test.ts b/tests/integration/managed-profile-handover-stepup-sso.test.ts
index bcb8f6d63..f4da13f7b 100644
--- a/tests/integration/managed-profile-handover-stepup-sso.test.ts
+++ b/tests/integration/managed-profile-handover-stepup-sso.test.ts
@@ -67,10 +67,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("@/lib/notifications/dispatch-localised", () => ({
   dispatchLocalisedNotification: vi.fn(async () => {}),
 }));
diff --git a/tests/integration/managed-profile-handover.test.ts b/tests/integration/managed-profile-handover.test.ts
index 6a6c5a5c7..de881e84c 100644
--- a/tests/integration/managed-profile-handover.test.ts
+++ b/tests/integration/managed-profile-handover.test.ts
@@ -78,10 +78,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 // The breach corpus is a network call; the claim's own logic is the subject.
 vi.mock("@/lib/password-breach-check", () => ({
   checkPasswordBreachIfEnabled: vi.fn().mockResolvedValue(null),
diff --git a/tests/integration/managed-profile-lifecycle.test.ts b/tests/integration/managed-profile-lifecycle.test.ts
index b1367db2d..d97a7419e 100644
--- a/tests/integration/managed-profile-lifecycle.test.ts
+++ b/tests/integration/managed-profile-lifecycle.test.ts
@@ -40,10 +40,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 let sequence = 0;
 
 async function createFreshMfaUser(label = "guardian") {
diff --git a/tests/integration/managed-profile-oauth-connect.test.ts b/tests/integration/managed-profile-oauth-connect.test.ts
index be879252e..7c6828cfa 100644
--- a/tests/integration/managed-profile-oauth-connect.test.ts
+++ b/tests/integration/managed-profile-oauth-connect.test.ts
@@ -38,10 +38,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const OURA_TOKEN_URL = "https://moi.ouraring.com/oauth/v2/ext/oauth-token";
 const OURA_ISS = "https://moi.ouraring.com/oauth/v2/ext/oauth-anonymous";
 const GUARDIAN = "guardian-oauth";
diff --git a/tests/integration/managed-profile-passkey-step-up.test.ts b/tests/integration/managed-profile-passkey-step-up.test.ts
index 06651bbb8..36e1bca54 100644
--- a/tests/integration/managed-profile-passkey-step-up.test.ts
+++ b/tests/integration/managed-profile-passkey-step-up.test.ts
@@ -44,10 +44,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("@/lib/notifications/dispatch-localised", () => ({
   dispatchLocalisedNotification: vi.fn(async () => {}),
 }));
diff --git a/tests/integration/managed-profile-surface.test.ts b/tests/integration/managed-profile-surface.test.ts
index b135ce059..57ed68f4b 100644
--- a/tests/integration/managed-profile-surface.test.ts
+++ b/tests/integration/managed-profile-surface.test.ts
@@ -58,10 +58,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 let sequence = 0;
 
 interface Person {
diff --git a/tests/integration/managed-record-capabilities.test.ts b/tests/integration/managed-record-capabilities.test.ts
index 66458e9ff..a2ef88e52 100644
--- a/tests/integration/managed-record-capabilities.test.ts
+++ b/tests/integration/managed-record-capabilities.test.ts
@@ -49,10 +49,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 import { delegatedDomains } from "@/lib/sharing/domain-write-support";
 import type { ShareDomain } from "@/lib/sharing/scope";
 
diff --git a/tests/integration/managed-record-modules.test.ts b/tests/integration/managed-record-modules.test.ts
index 181607419..c9d6db1bc 100644
--- a/tests/integration/managed-record-modules.test.ts
+++ b/tests/integration/managed-record-modules.test.ts
@@ -50,10 +50,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 let counter = 0;
 
 async function makeUser(label: string) {
diff --git a/tests/integration/manual-workout-edit.test.ts b/tests/integration/manual-workout-edit.test.ts
index 1abf71e2a..5cbfb8d20 100644
--- a/tests/integration/manual-workout-edit.test.ts
+++ b/tests/integration/manual-workout-edit.test.ts
@@ -43,10 +43,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 beforeEach(async () => {
   await truncateAllTables(getPrismaClient());
   cookieJar.clear();
diff --git a/tests/integration/mcp-metric-series-source-snapshot.test.ts b/tests/integration/mcp-metric-series-source-snapshot.test.ts
index ab95bc21a..37e6a3148 100644
--- a/tests/integration/mcp-metric-series-source-snapshot.test.ts
+++ b/tests/integration/mcp-metric-series-source-snapshot.test.ts
@@ -26,9 +26,6 @@ import { ensureUserMoodRollupsFresh } from "@/lib/rollups/mood-rollups";
 import type { CoachScopeSource, CoachScopeWindow } from "@/lib/ai/coach/types";
 import type { MeasurementType, SleepStage } from "@/generated/prisma/client";
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("@/lib/jobs/boss-instance", () => ({
   getGlobalBoss: vi.fn(() => null),
 }));
diff --git a/tests/integration/measurement-rollups.test.ts b/tests/integration/measurement-rollups.test.ts
index 795b30c2a..10441641a 100644
--- a/tests/integration/measurement-rollups.test.ts
+++ b/tests/integration/measurement-rollups.test.ts
@@ -41,10 +41,6 @@ import { aggregateBuckets } from "@/lib/rollups/measurement-read";
 import { buildComprehensiveAggregate } from "@/lib/insights/comprehensive-aggregator";
 import { windowWeighting } from "@/lib/measurements/day-statistic";
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 // Stub boss-instance with a vi.fn so we can swap the return per test.
 // The integration suite runs with `isolate: false`, so the mock state
 // is shared with sibling files (e.g. admin-backups-audit.test.ts also
diff --git a/tests/integration/measurement-soft-delete.test.ts b/tests/integration/measurement-soft-delete.test.ts
index 8703b9e46..7071e7612 100644
--- a/tests/integration/measurement-soft-delete.test.ts
+++ b/tests/integration/measurement-soft-delete.test.ts
@@ -60,10 +60,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 beforeEach(async () => {
   await truncateAllTables(getPrismaClient());
   cookieJar.clear();
diff --git a/tests/integration/measurement-source-write-smoke.test.ts b/tests/integration/measurement-source-write-smoke.test.ts
index d117bd576..d2aa00ea3 100644
--- a/tests/integration/measurement-source-write-smoke.test.ts
+++ b/tests/integration/measurement-source-write-smoke.test.ts
@@ -52,10 +52,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const USER_ID = "measurement-source-write-smoke";
 const MEASURED_AT = new Date("2026-07-20T08:00:00.000Z");
 
diff --git a/tests/integration/measurements-aggregate-daily.test.ts b/tests/integration/measurements-aggregate-daily.test.ts
index 041ce9716..2783efcc6 100644
--- a/tests/integration/measurements-aggregate-daily.test.ts
+++ b/tests/integration/measurements-aggregate-daily.test.ts
@@ -42,10 +42,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 beforeEach(async () => {
   await truncateAllTables(getPrismaClient());
   cookieJar.clear();
diff --git a/tests/integration/measurements-batch-delete.test.ts b/tests/integration/measurements-batch-delete.test.ts
index a3a3f9d55..1c62f9a88 100644
--- a/tests/integration/measurements-batch-delete.test.ts
+++ b/tests/integration/measurements-batch-delete.test.ts
@@ -44,10 +44,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 beforeEach(async () => {
   await truncateAllTables(getPrismaClient());
   cookieJar.clear();
diff --git a/tests/integration/measurements-batch-perf.test.ts b/tests/integration/measurements-batch-perf.test.ts
index 900a4e4d1..2553f7739 100644
--- a/tests/integration/measurements-batch-perf.test.ts
+++ b/tests/integration/measurements-batch-perf.test.ts
@@ -43,10 +43,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const rollupCalls = vi.hoisted(() => ({ count: 0 }));
 vi.mock("@/lib/rollups/after-measurement-mutation", async () => {
   const actual = await vi.importActual<
diff --git a/tests/integration/measurements-batch-set-insert-golden.test.ts b/tests/integration/measurements-batch-set-insert-golden.test.ts
index 1d1b8eaf6..260a2447f 100644
--- a/tests/integration/measurements-batch-set-insert-golden.test.ts
+++ b/tests/integration/measurements-batch-set-insert-golden.test.ts
@@ -38,10 +38,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const SET_USER = "golden-set-based";
 const RECONCILER_USER = "golden-reconciler";
 
diff --git a/tests/integration/measurements-batch.test.ts b/tests/integration/measurements-batch.test.ts
index 91c1b0295..4e1cab34e 100644
--- a/tests/integration/measurements-batch.test.ts
+++ b/tests/integration/measurements-batch.test.ts
@@ -41,10 +41,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 beforeEach(async () => {
   await truncateAllTables(getPrismaClient());
   cookieJar.clear();
diff --git a/tests/integration/measurements-day-grouped-paging.test.ts b/tests/integration/measurements-day-grouped-paging.test.ts
index 17adde8f9..8ab4fd79a 100644
--- a/tests/integration/measurements-day-grouped-paging.test.ts
+++ b/tests/integration/measurements-day-grouped-paging.test.ts
@@ -32,10 +32,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 beforeEach(async () => {
   await truncateAllTables(getPrismaClient());
   cookieJar.clear();
diff --git a/tests/integration/measurements-duplicate-conflict.test.ts b/tests/integration/measurements-duplicate-conflict.test.ts
index 98425868e..ce12ea7f8 100644
--- a/tests/integration/measurements-duplicate-conflict.test.ts
+++ b/tests/integration/measurements-duplicate-conflict.test.ts
@@ -51,10 +51,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 let counter = 0;
 
 const MEASURED_AT = "2026-03-04T07:30:00.000Z";
diff --git a/tests/integration/measurements-named-sleep-stage.test.ts b/tests/integration/measurements-named-sleep-stage.test.ts
index 809206262..c604e749a 100644
--- a/tests/integration/measurements-named-sleep-stage.test.ts
+++ b/tests/integration/measurements-named-sleep-stage.test.ts
@@ -47,10 +47,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const { POST } = await import("@/app/api/measurements/route");
 const { POST: POST_BATCH } = await import("@/app/api/measurements/batch/route");
 
diff --git a/tests/integration/measurements-sleep-list.test.ts b/tests/integration/measurements-sleep-list.test.ts
index 673347319..c71a34789 100644
--- a/tests/integration/measurements-sleep-list.test.ts
+++ b/tests/integration/measurements-sleep-list.test.ts
@@ -29,10 +29,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 beforeEach(async () => {
   await truncateAllTables(getPrismaClient());
   cookieJar.clear();
diff --git a/tests/integration/medication-auto-mark-taken.test.ts b/tests/integration/medication-auto-mark-taken.test.ts
index 6719dd9c2..8279113f7 100644
--- a/tests/integration/medication-auto-mark-taken.test.ts
+++ b/tests/integration/medication-auto-mark-taken.test.ts
@@ -39,9 +39,6 @@ vi.mock("next/headers", async () => {
     })),
   };
 });
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("@/lib/notifications/dispatcher", () => ({
   dispatchNotification: vi.fn().mockResolvedValue({
     dispatched: true,
diff --git a/tests/integration/medication-cadence-worker.test.ts b/tests/integration/medication-cadence-worker.test.ts
index f0c6b6600..0f296ef09 100644
--- a/tests/integration/medication-cadence-worker.test.ts
+++ b/tests/integration/medication-cadence-worker.test.ts
@@ -66,10 +66,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 // Side-effects on the create-intake hot path that the one-shot test
 // exercises but doesn't care about — keep them inert so the test
 // stays focused on the schedule-resolution + lifecycle contract.
diff --git a/tests/integration/medication-course-end.test.ts b/tests/integration/medication-course-end.test.ts
index 714e9e4f8..1e6c9c806 100644
--- a/tests/integration/medication-course-end.test.ts
+++ b/tests/integration/medication-course-end.test.ts
@@ -42,9 +42,6 @@ vi.mock("next/headers", async () => {
     })),
   };
 });
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("@/lib/notifications/dispatcher", () => ({
   dispatchNotification: vi.fn().mockResolvedValue({
     dispatched: true,
diff --git a/tests/integration/medication-courses.test.ts b/tests/integration/medication-courses.test.ts
index dc9682456..21cdd5c02 100644
--- a/tests/integration/medication-courses.test.ts
+++ b/tests/integration/medication-courses.test.ts
@@ -45,10 +45,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 beforeEach(async () => {
   const prisma = getPrismaClient();
   await truncateAllTables(prisma);
diff --git a/tests/integration/medication-custom-categories.test.ts b/tests/integration/medication-custom-categories.test.ts
index 262ea7e75..a711fbb56 100644
--- a/tests/integration/medication-custom-categories.test.ts
+++ b/tests/integration/medication-custom-categories.test.ts
@@ -39,10 +39,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 async function signIn(userId: string) {
   const session = await getPrismaClient().session.create({
     data: { userId, expiresAt: new Date(Date.now() + 60 * 60 * 1000) },
diff --git a/tests/integration/medication-extra-dose-apple-health.test.ts b/tests/integration/medication-extra-dose-apple-health.test.ts
index 4e58ba78d..30ed71fc9 100644
--- a/tests/integration/medication-extra-dose-apple-health.test.ts
+++ b/tests/integration/medication-extra-dose-apple-health.test.ts
@@ -46,10 +46,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const TZ = "Europe/Berlin";
 const DAY_MS = 24 * 60 * 60 * 1000;
 const MIN = 60_000;
diff --git a/tests/integration/medication-intake-tracking.test.ts b/tests/integration/medication-intake-tracking.test.ts
index 68ab45991..7ec5617d3 100644
--- a/tests/integration/medication-intake-tracking.test.ts
+++ b/tests/integration/medication-intake-tracking.test.ts
@@ -35,9 +35,6 @@ vi.mock("next/headers", async () => {
     })),
   };
 });
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("@/lib/notifications/dispatcher", () => ({
   dispatchNotification: vi.fn().mockResolvedValue({
     dispatched: true,
diff --git a/tests/integration/medication-put-course-race.test.ts b/tests/integration/medication-put-course-race.test.ts
index 5b6410394..7864cff89 100644
--- a/tests/integration/medication-put-course-race.test.ts
+++ b/tests/integration/medication-put-course-race.test.ts
@@ -40,10 +40,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 // The check the concurrent request outran: it saw no conflict.
 vi.mock("@/lib/medications/courses", async (importOriginal) => ({
   ...(await importOriginal<typeof import("@/lib/medications/courses")>()),
diff --git a/tests/integration/medication-rolling-overdue-consumers.test.ts b/tests/integration/medication-rolling-overdue-consumers.test.ts
index 2565b58bf..064df492c 100644
--- a/tests/integration/medication-rolling-overdue-consumers.test.ts
+++ b/tests/integration/medication-rolling-overdue-consumers.test.ts
@@ -28,10 +28,6 @@ const LAST_TAKEN = new Date("2026-07-21T06:00:00.000Z");
 const OVERDUE_OCCURRENCE = new Date("2026-07-28T06:00:00.000Z");
 const NEXT_OCCURRENCE = new Date("2026-08-04T06:00:00.000Z");
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 beforeEach(async () => {
   vi.useFakeTimers({ toFake: ["Date"] });
   vi.setSystemTime(NOW);
diff --git a/tests/integration/medication-write-idempotency.test.ts b/tests/integration/medication-write-idempotency.test.ts
index b83a9d138..6c42a9723 100644
--- a/tests/integration/medication-write-idempotency.test.ts
+++ b/tests/integration/medication-write-idempotency.test.ts
@@ -55,10 +55,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 beforeEach(async () => {
   await truncateAllTables(getPrismaClient());
   cookieJar.clear();
diff --git a/tests/integration/medications-intake-bulk.test.ts b/tests/integration/medications-intake-bulk.test.ts
index 886e2dc90..df63bb077 100644
--- a/tests/integration/medications-intake-bulk.test.ts
+++ b/tests/integration/medications-intake-bulk.test.ts
@@ -38,10 +38,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 let ownedMedId = "";
 let foreignMedId = "";
 
diff --git a/tests/integration/mental-health-wording.test.ts b/tests/integration/mental-health-wording.test.ts
index 5414872b9..03fc2a6cc 100644
--- a/tests/integration/mental-health-wording.test.ts
+++ b/tests/integration/mental-health-wording.test.ts
@@ -28,10 +28,6 @@ import { callRoute } from "../kit/call-route";
 import { makeSession, makeUser, type SessionFixture } from "../kit/factories";
 import { getPrismaClient, truncateAllTables } from "./setup";
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 // The reminder satisfy and the rollup tail hand work to pg-boss; the queue is
 // not what this file is about.
 vi.mock("@/lib/jobs/boss-instance", () => ({
diff --git a/tests/integration/mfa-login-flow.test.ts b/tests/integration/mfa-login-flow.test.ts
index 43e53ccfc..926c09dc2 100644
--- a/tests/integration/mfa-login-flow.test.ts
+++ b/tests/integration/mfa-login-flow.test.ts
@@ -15,10 +15,6 @@ import { getPrismaClient, truncateAllTables } from "./setup";
 process.env.API_TOKEN_HMAC_KEY ??=
   "test-hmac-key-test-hmac-key-test-hmac-key-0123456789";
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 function codeAt(secretBase32: string, atMs: number): string {
   const totp = new OTPAuth.TOTP({
     issuer: "HealthLog",
diff --git a/tests/integration/mood-backup-round-trip.test.ts b/tests/integration/mood-backup-round-trip.test.ts
index 7317d44c0..ae20ff812 100644
--- a/tests/integration/mood-backup-round-trip.test.ts
+++ b/tests/integration/mood-backup-round-trip.test.ts
@@ -53,10 +53,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("@/lib/cache/invalidate", () => ({
   invalidateUserData: vi.fn(),
 }));
diff --git a/tests/integration/mood-context-linkage.test.ts b/tests/integration/mood-context-linkage.test.ts
index e3230ec3f..eb9645656 100644
--- a/tests/integration/mood-context-linkage.test.ts
+++ b/tests/integration/mood-context-linkage.test.ts
@@ -41,10 +41,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 beforeEach(async () => {
   await truncateAllTables(getPrismaClient());
   cookieJar.clear();
diff --git a/tests/integration/mood-context.test.ts b/tests/integration/mood-context.test.ts
index c5222f1db..42a5e9ae3 100644
--- a/tests/integration/mood-context.test.ts
+++ b/tests/integration/mood-context.test.ts
@@ -45,10 +45,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 beforeEach(async () => {
   await truncateAllTables(getPrismaClient());
   cookieJar.clear();
diff --git a/tests/integration/mood-entries-bulk.test.ts b/tests/integration/mood-entries-bulk.test.ts
index 50818240e..b0048e416 100644
--- a/tests/integration/mood-entries-bulk.test.ts
+++ b/tests/integration/mood-entries-bulk.test.ts
@@ -35,10 +35,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 beforeEach(async () => {
   await truncateAllTables(getPrismaClient());
   cookieJar.clear();
diff --git a/tests/integration/mood-entries-external-id.test.ts b/tests/integration/mood-entries-external-id.test.ts
index 6945419ab..223648ee7 100644
--- a/tests/integration/mood-entries-external-id.test.ts
+++ b/tests/integration/mood-entries-external-id.test.ts
@@ -45,10 +45,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 async function createUserSession(userId: string, username: string) {
   await getPrismaClient().user.create({
     data: {
diff --git a/tests/integration/mood-entries-note-column.test.ts b/tests/integration/mood-entries-note-column.test.ts
index 3fb786d07..543513f7b 100644
--- a/tests/integration/mood-entries-note-column.test.ts
+++ b/tests/integration/mood-entries-note-column.test.ts
@@ -40,10 +40,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 beforeEach(async () => {
   await truncateAllTables(getPrismaClient());
   cookieJar.clear();
diff --git a/tests/integration/mood-insights-crosstab.test.ts b/tests/integration/mood-insights-crosstab.test.ts
index 54428f853..fb2576ab9 100644
--- a/tests/integration/mood-insights-crosstab.test.ts
+++ b/tests/integration/mood-insights-crosstab.test.ts
@@ -13,10 +13,6 @@ import { beforeEach, describe, expect, it, vi } from "vitest";
 import { getPrismaClient, truncateAllTables } from "./setup";
 import { fetchMoodAggregates } from "@/lib/insights/mood-aggregates";
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const TEST_USER_ID = "user-crosstab";
 const dayMs = 24 * 60 * 60 * 1000;
 const NOW = new Date("2026-06-01T12:00:00.000Z");
diff --git a/tests/integration/mood-prognosis-ladder.test.ts b/tests/integration/mood-prognosis-ladder.test.ts
index 294941871..7123f3bb4 100644
--- a/tests/integration/mood-prognosis-ladder.test.ts
+++ b/tests/integration/mood-prognosis-ladder.test.ts
@@ -41,10 +41,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 /** Fixed clock: a ladder test that slides with the calendar is a date bomb. */
 const FIXED_NOW = new Date("2026-08-08T09:00:00.000Z");
 /**
diff --git a/tests/integration/mood-tag-groups.test.ts b/tests/integration/mood-tag-groups.test.ts
index 58b1081dc..418476ee3 100644
--- a/tests/integration/mood-tag-groups.test.ts
+++ b/tests/integration/mood-tag-groups.test.ts
@@ -46,10 +46,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 async function createUserSession(userId: string, username: string) {
   await getPrismaClient().user.create({
     data: {
diff --git a/tests/integration/mood-writers-agree.test.ts b/tests/integration/mood-writers-agree.test.ts
index 5978d7311..603e0a43b 100644
--- a/tests/integration/mood-writers-agree.test.ts
+++ b/tests/integration/mood-writers-agree.test.ts
@@ -47,10 +47,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 async function createUserSession() {
   await getPrismaClient().user.create({
     data: {
diff --git a/tests/integration/notification-action-mood.test.ts b/tests/integration/notification-action-mood.test.ts
index 59fd707f7..cb7584409 100644
--- a/tests/integration/notification-action-mood.test.ts
+++ b/tests/integration/notification-action-mood.test.ts
@@ -14,10 +14,6 @@ import { getPrismaClient, truncateAllTables } from "./setup";
 
 const USER = "user-notification-action";
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 function call(token: string) {
   return import("@/app/api/notifications/action/[token]/route").then(
     ({ POST }) =>
diff --git a/tests/integration/notification-event-defaults.test.ts b/tests/integration/notification-event-defaults.test.ts
index fee0d689b..588a4700b 100644
--- a/tests/integration/notification-event-defaults.test.ts
+++ b/tests/integration/notification-event-defaults.test.ts
@@ -44,10 +44,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const USERNAME = "event-defaults";
 
 async function seedAccount(moodReminderEnabled: boolean): Promise<string> {
diff --git a/tests/integration/notification-global-channel-switch.test.ts b/tests/integration/notification-global-channel-switch.test.ts
index ef66389b1..7216b486b 100644
--- a/tests/integration/notification-global-channel-switch.test.ts
+++ b/tests/integration/notification-global-channel-switch.test.ts
@@ -18,10 +18,6 @@ vi.mock("@/lib/notifications/senders/ntfy", () => ({
   sendViaNtfy: (...args: unknown[]) => ntfySendMock(...args),
 }));
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 import { getPrismaClient, truncateAllTables } from "./setup";
 
 const TEST_USER_ID = "user-global-channel-switch";
diff --git a/tests/integration/nutrients-batch.test.ts b/tests/integration/nutrients-batch.test.ts
index 75400f8c0..8587ad74a 100644
--- a/tests/integration/nutrients-batch.test.ts
+++ b/tests/integration/nutrients-batch.test.ts
@@ -40,10 +40,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 async function signIn(userId: string): Promise<void> {
   const session = await getPrismaClient().session.create({
     data: {
diff --git a/tests/integration/oauth-callback-single-use.test.ts b/tests/integration/oauth-callback-single-use.test.ts
index 6f71de311..150121b3a 100644
--- a/tests/integration/oauth-callback-single-use.test.ts
+++ b/tests/integration/oauth-callback-single-use.test.ts
@@ -44,10 +44,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const USER = "user-oauth-single-use";
 const OURA_TOKEN_URL = "https://moi.ouraring.com/oauth/v2/ext/oauth-token";
 const OURA_ISS = "https://moi.ouraring.com/oauth/v2/ext/oauth-anonymous";
diff --git a/tests/integration/offhost-purge-on-deletion.test.ts b/tests/integration/offhost-purge-on-deletion.test.ts
index 4e141292b..8ca5af4ca 100644
--- a/tests/integration/offhost-purge-on-deletion.test.ts
+++ b/tests/integration/offhost-purge-on-deletion.test.ts
@@ -64,10 +64,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 beforeEach(async () => {
   await truncateAllTables(getPrismaClient());
   cookieJar.clear();
diff --git a/tests/integration/oidc-pending-link.test.ts b/tests/integration/oidc-pending-link.test.ts
index 4bc34c225..d98afa310 100644
--- a/tests/integration/oidc-pending-link.test.ts
+++ b/tests/integration/oidc-pending-link.test.ts
@@ -34,10 +34,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const { hashPassword } = await import("@/lib/auth/password");
 const { encrypt } = await import("@/lib/crypto");
 
diff --git a/tests/integration/oidc-reproof.test.ts b/tests/integration/oidc-reproof.test.ts
index cc5f728dc..d59622006 100644
--- a/tests/integration/oidc-reproof.test.ts
+++ b/tests/integration/oidc-reproof.test.ts
@@ -36,10 +36,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const ISSUER = "https://idp.example.test";
 const METADATA = {
   issuer: ISSUER,
diff --git a/tests/integration/onboarding-needs.test.ts b/tests/integration/onboarding-needs.test.ts
index b45732e56..49b54f12d 100644
--- a/tests/integration/onboarding-needs.test.ts
+++ b/tests/integration/onboarding-needs.test.ts
@@ -47,10 +47,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 import { acceptGrant, inviteGrant } from "@/lib/sharing/grants";
 import {
   DEFAULT_DASHBOARD_LAYOUT,
diff --git a/tests/integration/openapi-get-contract.test.ts b/tests/integration/openapi-get-contract.test.ts
index f21ed4cbc..477749079 100644
--- a/tests/integration/openapi-get-contract.test.ts
+++ b/tests/integration/openapi-get-contract.test.ts
@@ -77,10 +77,6 @@ vi.mock("@/lib/jobs/worker-status", async (importOriginal) => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 // No request leaves the process. An operation that needs the network to
 // answer belongs in NOT_CALLED with that reason; one that merely tries and
 // copes with the failure is checked on the path it takes when it cannot.
diff --git a/tests/integration/openapi-response-shape.test.ts b/tests/integration/openapi-response-shape.test.ts
index 59c640c99..40a39a6c3 100644
--- a/tests/integration/openapi-response-shape.test.ts
+++ b/tests/integration/openapi-response-shape.test.ts
@@ -59,10 +59,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 beforeEach(async () => {
   const prisma = getPrismaClient();
   await truncateAllTables(prisma);
diff --git a/tests/integration/oura-backfill.test.ts b/tests/integration/oura-backfill.test.ts
index 8dd616149..1a6337d61 100644
--- a/tests/integration/oura-backfill.test.ts
+++ b/tests/integration/oura-backfill.test.ts
@@ -51,10 +51,6 @@ const fake = vi.hoisted(() => ({
   sends: [] as Array<{ queue: string; payload: unknown; options: unknown }>,
 }));
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("@/lib/jobs/boss-instance", () => ({
   getGlobalBoss: () => ({
     send: async (queue: string, payload: unknown, options: unknown) => {
diff --git a/tests/integration/partial-unique-live-rows.test.ts b/tests/integration/partial-unique-live-rows.test.ts
index 109a0c674..571744249 100644
--- a/tests/integration/partial-unique-live-rows.test.ts
+++ b/tests/integration/partial-unique-live-rows.test.ts
@@ -29,10 +29,6 @@ import { applyCanonicalSlotWrite } from "@/lib/medications/scheduling/slot-upser
 
 import { getPrismaClient, truncateAllTables } from "./setup";
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 beforeEach(async () => {
   await truncateAllTables(getPrismaClient());
 });
diff --git a/tests/integration/passkey-register.test.ts b/tests/integration/passkey-register.test.ts
index eeb054816..2566b9323 100644
--- a/tests/integration/passkey-register.test.ts
+++ b/tests/integration/passkey-register.test.ts
@@ -42,10 +42,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("@/lib/auth/passkey", async () => {
   const actual =
     await vi.importActual<typeof import("@/lib/auth/passkey")>(
diff --git a/tests/integration/pr-detection-cumulative-paged.test.ts b/tests/integration/pr-detection-cumulative-paged.test.ts
index 9bfc38159..16abfa6f8 100644
--- a/tests/integration/pr-detection-cumulative-paged.test.ts
+++ b/tests/integration/pr-detection-cumulative-paged.test.ts
@@ -16,10 +16,6 @@ import { beforeEach, describe, expect, it, vi } from "vitest";
 
 import { getPrismaClient, truncateAllTables } from "./setup";
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const { detectPersonalRecordsForUser } =
   await import("@/lib/personal-records/pr-detection-worker");
 
diff --git a/tests/integration/pr-detection-end-to-end.test.ts b/tests/integration/pr-detection-end-to-end.test.ts
index 2efb51c63..91e8d85e7 100644
--- a/tests/integration/pr-detection-end-to-end.test.ts
+++ b/tests/integration/pr-detection-end-to-end.test.ts
@@ -22,10 +22,6 @@ import { beforeEach, describe, expect, it, vi } from "vitest";
 
 import { getPrismaClient, truncateAllTables } from "./setup";
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const TEST_USER_ID = "user-pr-detection-e2e";
 
 const { detectPersonalRecordsForUser, PR_DETECTION_WARMUP_THRESHOLD } =
diff --git a/tests/integration/practitioner-contact-encryption.test.ts b/tests/integration/practitioner-contact-encryption.test.ts
index 82df5cb39..7465e871c 100644
--- a/tests/integration/practitioner-contact-encryption.test.ts
+++ b/tests/integration/practitioner-contact-encryption.test.ts
@@ -44,10 +44,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const OWNER_ID = "practitioner-contact-owner";
 const PHONE = "+49 30 9876543";
 const ADDRESS = "Lindenweg 12, 10115 Berlin";
diff --git a/tests/integration/practitioner-specialty-search.test.ts b/tests/integration/practitioner-specialty-search.test.ts
index 5448c0103..1b0e2d996 100644
--- a/tests/integration/practitioner-specialty-search.test.ts
+++ b/tests/integration/practitioner-specialty-search.test.ts
@@ -34,10 +34,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const OWNER_ID = "practitioner-search-owner";
 
 function daysFromNow(days: number): Date {
diff --git a/tests/integration/profile-display-name.test.ts b/tests/integration/profile-display-name.test.ts
index 42c2092ec..f2479812b 100644
--- a/tests/integration/profile-display-name.test.ts
+++ b/tests/integration/profile-display-name.test.ts
@@ -38,10 +38,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 async function seed(displayName: string | null): Promise<string> {
   const prisma = getPrismaClient();
   const user = await prisma.user.create({
diff --git a/tests/integration/provider-dense-fold.test.ts b/tests/integration/provider-dense-fold.test.ts
index d25d0a9f6..095cdd3f1 100644
--- a/tests/integration/provider-dense-fold.test.ts
+++ b/tests/integration/provider-dense-fold.test.ts
@@ -30,10 +30,6 @@ import { makeUser } from "../kit/factories";
 
 import { getPrismaClient, truncateAllTables } from "./setup";
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const prisma = getPrismaClient();
 const DAY_MS = 86_400_000;
 const MIN_MS = 60_000;
diff --git a/tests/integration/provider-pause.test.ts b/tests/integration/provider-pause.test.ts
index 7926d84ef..5f82db3b1 100644
--- a/tests/integration/provider-pause.test.ts
+++ b/tests/integration/provider-pause.test.ts
@@ -11,10 +11,6 @@ import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
 
 import { getPrismaClient, truncateAllTables } from "./setup";
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 import {
   HARD_FAILURE_COOLDOWN_MS,
   PROVIDER_PAUSE_BASE_MS,
diff --git a/tests/integration/pulse-day-mean-zones.test.ts b/tests/integration/pulse-day-mean-zones.test.ts
index da0bdc286..2157070ac 100644
--- a/tests/integration/pulse-day-mean-zones.test.ts
+++ b/tests/integration/pulse-day-mean-zones.test.ts
@@ -48,10 +48,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const prisma = getPrismaClient();
 const DAY = 86_400_000;
 const now = new Date();
diff --git a/tests/integration/pulse-hourly-mean-day.test.ts b/tests/integration/pulse-hourly-mean-day.test.ts
index 5d87bbc8a..0cae7b067 100644
--- a/tests/integration/pulse-hourly-mean-day.test.ts
+++ b/tests/integration/pulse-hourly-mean-day.test.ts
@@ -45,10 +45,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const prisma = getPrismaClient();
 const USER = "pulse-hourly-mean";
 const DAY = 86_400_000;
diff --git a/tests/integration/pulse-window-mean-readers.test.ts b/tests/integration/pulse-window-mean-readers.test.ts
index 086adfef8..85819cb9c 100644
--- a/tests/integration/pulse-window-mean-readers.test.ts
+++ b/tests/integration/pulse-window-mean-readers.test.ts
@@ -46,10 +46,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 // The reads kick off a background rollup refresh; keep it off so the live
 // user stays on the live path for the whole file.
 vi.mock("@/lib/rollups/measurement-rollups", async (importOriginal) => {
diff --git a/tests/integration/query-budget-hot-routes.test.ts b/tests/integration/query-budget-hot-routes.test.ts
index 0a50202d6..6d8a6af4c 100644
--- a/tests/integration/query-budget-hot-routes.test.ts
+++ b/tests/integration/query-budget-hot-routes.test.ts
@@ -54,10 +54,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const USER_ID = "user-query-budget";
 const DAY_MS = 86_400_000;
 
diff --git a/tests/integration/rate-limit-429-headers.test.ts b/tests/integration/rate-limit-429-headers.test.ts
index db4608027..23bb31d3a 100644
--- a/tests/integration/rate-limit-429-headers.test.ts
+++ b/tests/integration/rate-limit-429-headers.test.ts
@@ -53,10 +53,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 beforeEach(async () => {
   await truncateAllTables(getPrismaClient());
   cookieJar.clear();
diff --git a/tests/integration/recent-proof.test.ts b/tests/integration/recent-proof.test.ts
index 1a1325823..0349fc5c3 100644
--- a/tests/integration/recent-proof.test.ts
+++ b/tests/integration/recent-proof.test.ts
@@ -35,10 +35,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const USER_ID = "user-recent-proof";
 const PASSWORD = "Correct horse battery staple!42";
 const HOUR = 60 * 60 * 1000;
diff --git a/tests/integration/record-csv-import.test.ts b/tests/integration/record-csv-import.test.ts
index de25d0251..e04587f97 100644
--- a/tests/integration/record-csv-import.test.ts
+++ b/tests/integration/record-csv-import.test.ts
@@ -22,9 +22,6 @@ import {
   medicationsCsvQuerySchema,
 } from "@/lib/validations/record-import";
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("@/lib/jobs/boss-instance", () => ({
   getGlobalBoss: vi.fn(() => null),
 }));
diff --git a/tests/integration/record-search.test.ts b/tests/integration/record-search.test.ts
index f3f915254..a1e5e3f03 100644
--- a/tests/integration/record-search.test.ts
+++ b/tests/integration/record-search.test.ts
@@ -49,10 +49,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 let counter = 0;
 
 async function makeUser(label: string, modules: Record<string, boolean> = {}) {
diff --git a/tests/integration/record-session-fence-idempotency.test.ts b/tests/integration/record-session-fence-idempotency.test.ts
index c0691cb9a..1071018b7 100644
--- a/tests/integration/record-session-fence-idempotency.test.ts
+++ b/tests/integration/record-session-fence-idempotency.test.ts
@@ -51,10 +51,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 import { apiHandler, requireRecordAuth } from "@/lib/api-handler";
 import { prisma } from "@/lib/db";
 import { withIdempotency } from "@/lib/idempotency";
diff --git a/tests/integration/record-session-fence.test.ts b/tests/integration/record-session-fence.test.ts
index 881877328..7a5561a10 100644
--- a/tests/integration/record-session-fence.test.ts
+++ b/tests/integration/record-session-fence.test.ts
@@ -61,10 +61,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 import { apiHandler, requireRecordAuth } from "@/lib/api-handler";
 import { hashToken } from "@/lib/auth/hmac";
 import { prisma } from "@/lib/db";
diff --git a/tests/integration/record-settings-integrations-health.test.ts b/tests/integration/record-settings-integrations-health.test.ts
index bbd8a61c6..2ceace31b 100644
--- a/tests/integration/record-settings-integrations-health.test.ts
+++ b/tests/integration/record-settings-integrations-health.test.ts
@@ -30,10 +30,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 interface ManagedIntegration {
   integration: string;
   state: string;
diff --git a/tests/integration/recovery-kit.test.ts b/tests/integration/recovery-kit.test.ts
index d100f1d4e..8e939fb8b 100644
--- a/tests/integration/recovery-kit.test.ts
+++ b/tests/integration/recovery-kit.test.ts
@@ -44,10 +44,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 import { _resetCryptoCacheForTests, getKeyFingerprint } from "@/lib/crypto";
 import { offhostKeyId } from "@/lib/jobs/offhost-key";
 import type { RecoveryKit } from "@/lib/recovery/kit-rules";
diff --git a/tests/integration/recovery-readiness-dump-retention.test.ts b/tests/integration/recovery-readiness-dump-retention.test.ts
index b2f0eeb3b..9fedd424a 100644
--- a/tests/integration/recovery-readiness-dump-retention.test.ts
+++ b/tests/integration/recovery-readiness-dump-retention.test.ts
@@ -19,10 +19,6 @@ vi.mock("@/lib/jobs/offhost-backup", async (importOriginal) => ({
   probeOffhostLifecycle: () => probe(),
 }));
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 import { getPrismaClient, truncateAllTables } from "./setup";
 
 const NOW = new Date();
diff --git a/tests/integration/recovery-readiness-notify.test.ts b/tests/integration/recovery-readiness-notify.test.ts
index 863f2220b..317adf29b 100644
--- a/tests/integration/recovery-readiness-notify.test.ts
+++ b/tests/integration/recovery-readiness-notify.test.ts
@@ -55,10 +55,6 @@ vi.mock("@/lib/recovery/database-dump-health", () => ({
   readDatabaseBackupHealth: async () => null,
 }));
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 import { getPrismaClient, truncateAllTables } from "./setup";
 
 const ADMIN_ID = "user-readiness-admin";
diff --git a/tests/integration/relation-links-portable-restore.test.ts b/tests/integration/relation-links-portable-restore.test.ts
index 308369684..0c3e95438 100644
--- a/tests/integration/relation-links-portable-restore.test.ts
+++ b/tests/integration/relation-links-portable-restore.test.ts
@@ -51,10 +51,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("@/lib/cache/invalidate", () => ({
   invalidateUserData: vi.fn(),
 }));
diff --git a/tests/integration/request-clock-windows-session-tz.test.ts b/tests/integration/request-clock-windows-session-tz.test.ts
index 3b0d9aea7..7e2a1f2a1 100644
--- a/tests/integration/request-clock-windows-session-tz.test.ts
+++ b/tests/integration/request-clock-windows-session-tz.test.ts
@@ -12,10 +12,6 @@ vi.mock("@/lib/db-session", async (importOriginal) => {
   return { ...actual, TIME_ZONE_OPTION: "-c TimeZone=Pacific/Auckland" };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 // The read path's fire-and-forget refresh would build the rollup tier behind
 // the live case; the cases build it themselves when they mean to.
 vi.mock("@/lib/rollups/measurement-rollups", async (importOriginal) => ({
diff --git a/tests/integration/rest-mode-chronic.test.ts b/tests/integration/rest-mode-chronic.test.ts
index 201d458fc..e335f3c50 100644
--- a/tests/integration/rest-mode-chronic.test.ts
+++ b/tests/integration/rest-mode-chronic.test.ts
@@ -21,10 +21,6 @@ import type { ModuleKey } from "@/lib/modules/registry";
 
 import { getPrismaClient, truncateAllTables } from "./setup";
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const USER = "rest-mode-chronic";
 const DAY = 24 * 60 * 60 * 1000;
 
diff --git a/tests/integration/restore-consolidation-deadlock.test.ts b/tests/integration/restore-consolidation-deadlock.test.ts
index 82b6b991b..0e9deeb46 100644
--- a/tests/integration/restore-consolidation-deadlock.test.ts
+++ b/tests/integration/restore-consolidation-deadlock.test.ts
@@ -41,10 +41,6 @@ import {
 import { getPrismaClient, truncateAllTables } from "./setup";
 import { acceptingBoss } from "./restore-job-driver";
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const OWNER = "restore-deadlock-owner";
 const DAY = "2026-01-10";
 const TOTAL_ID = "deadlock-total";
diff --git a/tests/integration/rollup-concurrent-recompute.test.ts b/tests/integration/rollup-concurrent-recompute.test.ts
index d9ea3d6b3..c98f3b890 100644
--- a/tests/integration/rollup-concurrent-recompute.test.ts
+++ b/tests/integration/rollup-concurrent-recompute.test.ts
@@ -40,10 +40,6 @@ import {
   recomputeUserRollups,
 } from "@/lib/rollups/measurement-rollups";
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 // No pg-boss in the integration harness — the WEEK/MONTH/YEAR enqueue
 // inside the write hook is a silent no-op when no boss is attached.
 vi.mock("@/lib/jobs/boss-instance", () => ({
diff --git a/tests/integration/rollup-coverage-probe.test.ts b/tests/integration/rollup-coverage-probe.test.ts
index 05f99cf44..936d57b63 100644
--- a/tests/integration/rollup-coverage-probe.test.ts
+++ b/tests/integration/rollup-coverage-probe.test.ts
@@ -14,9 +14,6 @@ import { getPrismaClient, truncateAllTables } from "./setup";
 import { probeRollupCoverage } from "@/lib/rollups/measurement-coverage";
 import type { MeasurementType } from "@/generated/prisma/client";
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("@/lib/jobs/boss-instance", () => ({
   getGlobalBoss: vi.fn(() => null),
 }));
diff --git a/tests/integration/rollup-keyed-refold-session-tz.test.ts b/tests/integration/rollup-keyed-refold-session-tz.test.ts
index 30e88bb3c..45cfc04b8 100644
--- a/tests/integration/rollup-keyed-refold-session-tz.test.ts
+++ b/tests/integration/rollup-keyed-refold-session-tz.test.ts
@@ -15,10 +15,6 @@ vi.mock("@/lib/db-session", async (importOriginal) => {
   return { ...actual, TIME_ZONE_OPTION: "-c TimeZone=Pacific/Auckland" };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 import { getPrismaClient, truncateAllTables } from "./setup";
 import { prisma } from "@/lib/db";
 import {
diff --git a/tests/integration/rollup-per-day-canonical.test.ts b/tests/integration/rollup-per-day-canonical.test.ts
index c24606ade..b0278bd65 100644
--- a/tests/integration/rollup-per-day-canonical.test.ts
+++ b/tests/integration/rollup-per-day-canonical.test.ts
@@ -25,9 +25,6 @@ import { readAllTimeExtremes } from "@/lib/insights/feature-blocks";
 import { computeSummariesSlice } from "@/lib/analytics/summaries-slice";
 import type { MeasurementType } from "@/generated/prisma/client";
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("@/lib/jobs/boss-instance", () => ({
   getGlobalBoss: vi.fn(() => null),
 }));
diff --git a/tests/integration/rollup-regression-parity.integration.test.ts b/tests/integration/rollup-regression-parity.integration.test.ts
index 27a105734..71bf9ae43 100644
--- a/tests/integration/rollup-regression-parity.integration.test.ts
+++ b/tests/integration/rollup-regression-parity.integration.test.ts
@@ -43,10 +43,6 @@ import {
   type RegressionAccumulators,
 } from "@/lib/rollups/measurement-read";
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("@/lib/jobs/boss-instance", () => ({
   getGlobalBoss: vi.fn(() => null),
 }));
diff --git a/tests/integration/score-history.test.ts b/tests/integration/score-history.test.ts
index 7049a3594..433fb2697 100644
--- a/tests/integration/score-history.test.ts
+++ b/tests/integration/score-history.test.ts
@@ -37,10 +37,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 type Handler = (
   request: NextRequest,
   // eslint-disable-next-line @typescript-eslint/no-explicit-any
diff --git a/tests/integration/second-factor-ends-other-sessions.test.ts b/tests/integration/second-factor-ends-other-sessions.test.ts
index d0afaeab0..4007ffcc0 100644
--- a/tests/integration/second-factor-ends-other-sessions.test.ts
+++ b/tests/integration/second-factor-ends-other-sessions.test.ts
@@ -31,10 +31,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const USER_ID = "user-second-factor";
 const HOUR = 60 * 60 * 1000;
 
diff --git a/tests/integration/series-source-ladder.test.ts b/tests/integration/series-source-ladder.test.ts
index 440d9fc71..566b3b109 100644
--- a/tests/integration/series-source-ladder.test.ts
+++ b/tests/integration/series-source-ladder.test.ts
@@ -46,10 +46,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const prisma = getPrismaClient();
 const TZ = "Europe/Berlin";
 const DUAL = "ladder-dual";
diff --git a/tests/integration/server-cache-routes.test.ts b/tests/integration/server-cache-routes.test.ts
index 64ad40cf2..53349ebb7 100644
--- a/tests/integration/server-cache-routes.test.ts
+++ b/tests/integration/server-cache-routes.test.ts
@@ -50,10 +50,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 beforeEach(async () => {
   await truncateAllTables(getPrismaClient());
   cookieJar.clear();
diff --git a/tests/integration/settings-account-delete.test.ts b/tests/integration/settings-account-delete.test.ts
index 2ba87b9cd..e33bf1d7f 100644
--- a/tests/integration/settings-account-delete.test.ts
+++ b/tests/integration/settings-account-delete.test.ts
@@ -41,10 +41,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 beforeEach(async () => {
   await truncateAllTables(getPrismaClient());
   cookieJar.clear();
diff --git a/tests/integration/settings-data-wipe.test.ts b/tests/integration/settings-data-wipe.test.ts
index eda115f08..59a391330 100644
--- a/tests/integration/settings-data-wipe.test.ts
+++ b/tests/integration/settings-data-wipe.test.ts
@@ -65,10 +65,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 async function managedProfileLockIsHeld(
   prisma: PrismaClient,
   profileId: string,
diff --git a/tests/integration/settings-erasure-bearer-step-up.test.ts b/tests/integration/settings-erasure-bearer-step-up.test.ts
index 9ecabde82..3a04a9f2e 100644
--- a/tests/integration/settings-erasure-bearer-step-up.test.ts
+++ b/tests/integration/settings-erasure-bearer-step-up.test.ts
@@ -47,10 +47,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 beforeEach(async () => {
   await truncateAllTables(getPrismaClient());
   cookieJar.clear();
diff --git a/tests/integration/settings-prefs-routes.test.ts b/tests/integration/settings-prefs-routes.test.ts
index 2a18cdf04..b0b91739d 100644
--- a/tests/integration/settings-prefs-routes.test.ts
+++ b/tests/integration/settings-prefs-routes.test.ts
@@ -35,10 +35,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 beforeEach(async () => {
   await truncateAllTables(getPrismaClient());
   cookieJar.clear();
diff --git a/tests/integration/share-link-documents.test.ts b/tests/integration/share-link-documents.test.ts
index c2dfc0097..0d7c3861b 100644
--- a/tests/integration/share-link-documents.test.ts
+++ b/tests/integration/share-link-documents.test.ts
@@ -42,10 +42,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const PDF_SMALL = Buffer.from("%PDF-1.7\n1 0 obj\n<<>>\nendobj\n%%EOF\n");
 
 async function seedVaultUser(username: string) {
diff --git a/tests/integration/sharing-account-access.test.ts b/tests/integration/sharing-account-access.test.ts
index 204e2e4de..d02ec5aa3 100644
--- a/tests/integration/sharing-account-access.test.ts
+++ b/tests/integration/sharing-account-access.test.ts
@@ -36,10 +36,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 import { ACCOUNT_SELECTOR_HEADER } from "@/lib/api-handler";
 import { hashToken } from "@/lib/auth/hmac";
 
diff --git a/tests/integration/sharing-audit-actor.test.ts b/tests/integration/sharing-audit-actor.test.ts
index 57874c92f..1d789e94a 100644
--- a/tests/integration/sharing-audit-actor.test.ts
+++ b/tests/integration/sharing-audit-actor.test.ts
@@ -43,10 +43,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 import { apiHandler, requireRecordAuth } from "@/lib/api-handler";
 import { auditLog, DELEGATED_ACCESS_ACTION } from "@/lib/auth/audit";
 import { acceptGrant, inviteGrant } from "@/lib/sharing/grants";
diff --git a/tests/integration/sharing-delegable-routes.test.ts b/tests/integration/sharing-delegable-routes.test.ts
index de4647e82..9a277462d 100644
--- a/tests/integration/sharing-delegable-routes.test.ts
+++ b/tests/integration/sharing-delegable-routes.test.ts
@@ -53,10 +53,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 let counter = 0;
 
 async function makeUser(label: string) {
diff --git a/tests/integration/sharing-delegable-writes.test.ts b/tests/integration/sharing-delegable-writes.test.ts
index 5d698aade..76ddb68b3 100644
--- a/tests/integration/sharing-delegable-writes.test.ts
+++ b/tests/integration/sharing-delegable-writes.test.ts
@@ -62,10 +62,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 /**
  * The one collaborator this file stubs, and only at the seam it is testing.
  *
diff --git a/tests/integration/sharing-front-door.test.ts b/tests/integration/sharing-front-door.test.ts
index 16f1a0d28..de425efd1 100644
--- a/tests/integration/sharing-front-door.test.ts
+++ b/tests/integration/sharing-front-door.test.ts
@@ -56,10 +56,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 let counter = 0;
 
 async function makeUser(label: string) {
diff --git a/tests/integration/sharing-idempotency-revocation.test.ts b/tests/integration/sharing-idempotency-revocation.test.ts
index b944ae5bc..f8f120676 100644
--- a/tests/integration/sharing-idempotency-revocation.test.ts
+++ b/tests/integration/sharing-idempotency-revocation.test.ts
@@ -33,10 +33,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 import {
   ACCOUNT_SELECTOR_HEADER,
   apiHandler,
diff --git a/tests/integration/sharing-lifecycle.test.ts b/tests/integration/sharing-lifecycle.test.ts
index c9a1cd724..895acee73 100644
--- a/tests/integration/sharing-lifecycle.test.ts
+++ b/tests/integration/sharing-lifecycle.test.ts
@@ -44,10 +44,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 import { apiHandler, requireRecordAuth } from "@/lib/api-handler";
 import { hashToken } from "@/lib/auth/hmac";
 import { prisma } from "@/lib/db";
diff --git a/tests/integration/sharing-manage-handler-matrix.test.ts b/tests/integration/sharing-manage-handler-matrix.test.ts
index abc6f0f37..247513c75 100644
--- a/tests/integration/sharing-manage-handler-matrix.test.ts
+++ b/tests/integration/sharing-manage-handler-matrix.test.ts
@@ -66,10 +66,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 // Import admissions have a durable database effect plus an asynchronous queue
 // hand-off. Keep the hand-off deterministic here so each route test can prove
 // the persisted job and actor audit without requiring a running worker.
diff --git a/tests/integration/sharing-provider-origin.test.ts b/tests/integration/sharing-provider-origin.test.ts
index d433804e9..b8c2503e7 100644
--- a/tests/integration/sharing-provider-origin.test.ts
+++ b/tests/integration/sharing-provider-origin.test.ts
@@ -33,10 +33,6 @@ vi.mock("@/lib/jobs/boss-instance", () => ({
   getGlobalBoss: vi.fn(() => ({ send })),
 }));
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 import {
   ACCOUNT_SELECTOR_HEADER,
   apiHandler,
diff --git a/tests/integration/sharing-scope-fence.test.ts b/tests/integration/sharing-scope-fence.test.ts
index f8d88f3e8..6ec2dd6a3 100644
--- a/tests/integration/sharing-scope-fence.test.ts
+++ b/tests/integration/sharing-scope-fence.test.ts
@@ -57,10 +57,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 let counter = 0;
 
 async function makeUser(label: string) {
diff --git a/tests/integration/sleep-entry-hours-round-trip.test.ts b/tests/integration/sleep-entry-hours-round-trip.test.ts
index 9389eb742..6ea00020e 100644
--- a/tests/integration/sleep-entry-hours-round-trip.test.ts
+++ b/tests/integration/sleep-entry-hours-round-trip.test.ts
@@ -46,10 +46,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 let counter = 0;
 
 async function makeUser() {
diff --git a/tests/integration/sleep-night-sql-parity.test.ts b/tests/integration/sleep-night-sql-parity.test.ts
index b6a11b0d7..c35ea37e4 100644
--- a/tests/integration/sleep-night-sql-parity.test.ts
+++ b/tests/integration/sleep-night-sql-parity.test.ts
@@ -29,10 +29,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 beforeEach(async () => {
   await truncateAllTables(getPrismaClient());
   cookieJar.clear();
diff --git a/tests/integration/soft-delete-copy-parity.test.ts b/tests/integration/soft-delete-copy-parity.test.ts
index 052cc1c63..cff137e12 100644
--- a/tests/integration/soft-delete-copy-parity.test.ts
+++ b/tests/integration/soft-delete-copy-parity.test.ts
@@ -46,10 +46,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 async function signIn(username: string): Promise<string> {
   const prisma = getPrismaClient();
   const user = await prisma.user.create({
diff --git a/tests/integration/soft-delete-purge.test.ts b/tests/integration/soft-delete-purge.test.ts
index d84cc7b01..ce16cfbf6 100644
--- a/tests/integration/soft-delete-purge.test.ts
+++ b/tests/integration/soft-delete-purge.test.ts
@@ -20,10 +20,6 @@ import {
 
 import { getPrismaClient, truncateAllTables } from "./setup";
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const USER = "soft-delete-purge-user";
 const NOW = new Date("2026-10-20T03:42:00.000Z");
 const DAY = 86_400_000;
diff --git a/tests/integration/source-aware-rollups.integration.test.ts b/tests/integration/source-aware-rollups.integration.test.ts
index f180dab39..5bceaeab8 100644
--- a/tests/integration/source-aware-rollups.integration.test.ts
+++ b/tests/integration/source-aware-rollups.integration.test.ts
@@ -37,10 +37,6 @@ import {
   readRollupBuckets,
 } from "@/lib/rollups/measurement-rollups";
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 // `recomputeBucketsForMeasurement` enqueues WEEK/MONTH/YEAR jobs via pg-boss;
 // the DAY-only `recomputeUserRollups` calls here never touch the queue, but the
 // sibling rollups test mocks the boss instance and the integration suite runs
diff --git a/tests/integration/source-ladder-new-sources.test.ts b/tests/integration/source-ladder-new-sources.test.ts
index 963ca9d00..f6a6379b4 100644
--- a/tests/integration/source-ladder-new-sources.test.ts
+++ b/tests/integration/source-ladder-new-sources.test.ts
@@ -22,10 +22,6 @@ import {
 } from "@/lib/analytics/source-rank-sql";
 import { boundInstantSql } from "@/lib/analytics/request-clock-sql";
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const prisma = getPrismaClient();
 const USER = "ladder-new-sources";
 const DAY = 86_400_000;
diff --git a/tests/integration/source-priority-two-axis.test.ts b/tests/integration/source-priority-two-axis.test.ts
index aa10d6c63..baa194bc9 100644
--- a/tests/integration/source-priority-two-axis.test.ts
+++ b/tests/integration/source-priority-two-axis.test.ts
@@ -64,10 +64,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 beforeEach(async () => {
   await truncateAllTables(getPrismaClient());
   cookieJar.clear();
diff --git a/tests/integration/source-provenance.test.ts b/tests/integration/source-provenance.test.ts
index 14b04ae3c..42b82c950 100644
--- a/tests/integration/source-provenance.test.ts
+++ b/tests/integration/source-provenance.test.ts
@@ -22,10 +22,6 @@ import {
 } from "@/lib/provenance/source-provenance";
 import type { Prisma } from "@/generated/prisma/client";
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const prisma = getPrismaClient();
 const USER = "provenance-user";
 const DAY = 86_400_000;
diff --git a/tests/integration/step-up-elevation.test.ts b/tests/integration/step-up-elevation.test.ts
index 7e6294853..aba5a7901 100644
--- a/tests/integration/step-up-elevation.test.ts
+++ b/tests/integration/step-up-elevation.test.ts
@@ -51,10 +51,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 beforeEach(async () => {
   await truncateAllTables(getPrismaClient());
   cookieJar.clear();
diff --git a/tests/integration/supplement-nutrients.test.ts b/tests/integration/supplement-nutrients.test.ts
index 75f698b0e..d746fe44b 100644
--- a/tests/integration/supplement-nutrients.test.ts
+++ b/tests/integration/supplement-nutrients.test.ts
@@ -49,9 +49,6 @@ vi.mock("next/headers", async () => {
     })),
   };
 });
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
 vi.mock("@/lib/notifications/medication-intake-sync", () => ({
   queueMedicationIntakeSync: vi.fn(),
 }));
diff --git a/tests/integration/switched-session-destructive-refusal.test.ts b/tests/integration/switched-session-destructive-refusal.test.ts
index dfd48f675..8664b39c0 100644
--- a/tests/integration/switched-session-destructive-refusal.test.ts
+++ b/tests/integration/switched-session-destructive-refusal.test.ts
@@ -43,10 +43,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const OWNER_ID = "switch-destructive-owner";
 const DELEGATE_ID = "switch-destructive-delegate";
 
diff --git a/tests/integration/symptoms.test.ts b/tests/integration/symptoms.test.ts
index 3271ec9ea..53c4b0a27 100644
--- a/tests/integration/symptoms.test.ts
+++ b/tests/integration/symptoms.test.ts
@@ -66,10 +66,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const OWNER_ID = "symptoms-owner";
 const OTHER_ID = "symptoms-other";
 
diff --git a/tests/integration/sync-changes.test.ts b/tests/integration/sync-changes.test.ts
index 671161f3f..b7092d344 100644
--- a/tests/integration/sync-changes.test.ts
+++ b/tests/integration/sync-changes.test.ts
@@ -41,10 +41,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 beforeEach(async () => {
   await truncateAllTables(getPrismaClient());
   cookieJar.clear();
diff --git a/tests/integration/sync-reset-after-restore.test.ts b/tests/integration/sync-reset-after-restore.test.ts
index d0d8f90d0..65f1a12f7 100644
--- a/tests/integration/sync-reset-after-restore.test.ts
+++ b/tests/integration/sync-reset-after-restore.test.ts
@@ -44,10 +44,6 @@ vi.mock("next/headers", async () => {
     })),
   };
 });
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 beforeEach(async () => {
   await truncateAllTables(getPrismaClient());
   cookieJar.clear();
diff --git a/tests/integration/sync-state.test.ts b/tests/integration/sync-state.test.ts
index b3318519f..ecaa6578a 100644
--- a/tests/integration/sync-state.test.ts
+++ b/tests/integration/sync-state.test.ts
@@ -36,10 +36,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 beforeEach(async () => {
   await truncateAllTables(getPrismaClient());
   cookieJar.clear();
diff --git a/tests/integration/tiered-context-local-day.test.ts b/tests/integration/tiered-context-local-day.test.ts
index a7dd40527..2405d5094 100644
--- a/tests/integration/tiered-context-local-day.test.ts
+++ b/tests/integration/tiered-context-local-day.test.ts
@@ -18,10 +18,6 @@ import { beforeAll, describe, expect, it, vi } from "vitest";
 
 import { getPrismaClient, truncateAllTables } from "./setup";
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 import { buildTieredSeries } from "@/lib/rollups/tiered-context";
 
 const prisma = getPrismaClient();
diff --git a/tests/integration/timeline-lab-series.test.ts b/tests/integration/timeline-lab-series.test.ts
index 48a71e6ca..8f31406d2 100644
--- a/tests/integration/timeline-lab-series.test.ts
+++ b/tests/integration/timeline-lab-series.test.ts
@@ -42,10 +42,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 type Handler = (
   request: NextRequest,
   // eslint-disable-next-line @typescript-eslint/no-explicit-any
diff --git a/tests/integration/timeline-rollup-boundary-zone.test.ts b/tests/integration/timeline-rollup-boundary-zone.test.ts
index 1fb74bd51..dc4f838b5 100644
--- a/tests/integration/timeline-rollup-boundary-zone.test.ts
+++ b/tests/integration/timeline-rollup-boundary-zone.test.ts
@@ -12,10 +12,6 @@ import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
 
 import { getPrismaClient, truncateAllTables } from "./setup";
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 /**
  * Five years before this the fold boundary falls on 2021-10-10, so the first
  * rolled-up month is November 2021 and the first rolled-up quarter Q1 2022.
diff --git a/tests/integration/timeline-sleep-nights.test.ts b/tests/integration/timeline-sleep-nights.test.ts
index d6ee07a80..a4c810e0e 100644
--- a/tests/integration/timeline-sleep-nights.test.ts
+++ b/tests/integration/timeline-sleep-nights.test.ts
@@ -13,10 +13,6 @@ import { beforeEach, describe, expect, it, vi } from "vitest";
 
 import { getPrismaClient, truncateAllTables } from "./setup";
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const TZ = "Europe/Berlin";
 const NOW = new Date("2026-10-09T12:00:00.000Z");
 
diff --git a/tests/integration/timezone-per-user.test.ts b/tests/integration/timezone-per-user.test.ts
index 30a1861d3..938c40f01 100644
--- a/tests/integration/timezone-per-user.test.ts
+++ b/tests/integration/timezone-per-user.test.ts
@@ -53,10 +53,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 beforeEach(async () => {
   await truncateAllTables(getPrismaClient());
   cookieJar.clear();
diff --git a/tests/integration/tombstone-cleanup-restore-lock.test.ts b/tests/integration/tombstone-cleanup-restore-lock.test.ts
index a639df410..16f5e882f 100644
--- a/tests/integration/tombstone-cleanup-restore-lock.test.ts
+++ b/tests/integration/tombstone-cleanup-restore-lock.test.ts
@@ -21,10 +21,6 @@ import { afterAll, beforeEach, describe, expect, it, vi } from "vitest";
 
 import { getPrismaClient, truncateAllTables } from "./setup";
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const RESTORING = "tombstone-restoring";
 const OTHER = "tombstone-other";
 const HOLD_MS = 3_000;
diff --git a/tests/integration/user-avatar.test.ts b/tests/integration/user-avatar.test.ts
index dbecb31a0..1f3c0df19 100644
--- a/tests/integration/user-avatar.test.ts
+++ b/tests/integration/user-avatar.test.ts
@@ -43,10 +43,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const PNG_1X1 = Buffer.from(
   "iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR4nGNgYGBgAAAABQABXvMqOgAAAABJRU5ErkJggg==",
   "base64",
diff --git a/tests/integration/vaccination-booster-mint.test.ts b/tests/integration/vaccination-booster-mint.test.ts
index 1e89514a5..3386bd2aa 100644
--- a/tests/integration/vaccination-booster-mint.test.ts
+++ b/tests/integration/vaccination-booster-mint.test.ts
@@ -41,10 +41,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const OWNER_ID = "mint-owner";
 const DAY_MS = 24 * 60 * 60 * 1000;
 
diff --git a/tests/integration/vaccination-booster-satisfy.test.ts b/tests/integration/vaccination-booster-satisfy.test.ts
index 8de0be3ef..f6d1db2a3 100644
--- a/tests/integration/vaccination-booster-satisfy.test.ts
+++ b/tests/integration/vaccination-booster-satisfy.test.ts
@@ -45,10 +45,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const OWNER_ID = "booster-owner";
 const DAY_MS = 24 * 60 * 60 * 1000;
 
diff --git a/tests/integration/vaccination-booster-scoped-delegate.test.ts b/tests/integration/vaccination-booster-scoped-delegate.test.ts
index 3427956f0..6d6dadb5b 100644
--- a/tests/integration/vaccination-booster-scoped-delegate.test.ts
+++ b/tests/integration/vaccination-booster-scoped-delegate.test.ts
@@ -44,10 +44,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const OWNER_ID = "booster-scope-owner";
 const DELEGATE_ID = "booster-scope-delegate";
 
diff --git a/tests/integration/vaccination-custom.test.ts b/tests/integration/vaccination-custom.test.ts
index c7e7b1e06..70e69f226 100644
--- a/tests/integration/vaccination-custom.test.ts
+++ b/tests/integration/vaccination-custom.test.ts
@@ -50,10 +50,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const DAY_MS = 24 * 60 * 60 * 1000;
 const daysAgo = (days: number) => new Date(Date.now() - days * DAY_MS);
 const daysFromNow = (days: number) => new Date(Date.now() + days * DAY_MS);
diff --git a/tests/integration/vaccination-managed-profile.test.ts b/tests/integration/vaccination-managed-profile.test.ts
index a49ddc77a..6bcf8c8c0 100644
--- a/tests/integration/vaccination-managed-profile.test.ts
+++ b/tests/integration/vaccination-managed-profile.test.ts
@@ -50,10 +50,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const DAY_MS = 24 * 60 * 60 * 1000;
 
 function daysAgo(days: number): Date {
diff --git a/tests/integration/vaccination-renewal.test.ts b/tests/integration/vaccination-renewal.test.ts
index a51e0025b..a95cf9d37 100644
--- a/tests/integration/vaccination-renewal.test.ts
+++ b/tests/integration/vaccination-renewal.test.ts
@@ -32,10 +32,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const OWNER_ID = "renewal-owner";
 const DELEGATE_ID = "renewal-delegate";
 
diff --git a/tests/integration/visit-link-picker-long-history.test.ts b/tests/integration/visit-link-picker-long-history.test.ts
index e67f629dd..cbb7ff090 100644
--- a/tests/integration/visit-link-picker-long-history.test.ts
+++ b/tests/integration/visit-link-picker-long-history.test.ts
@@ -56,10 +56,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const OWNER_ID = "long-history-owner";
 const DAY_MS = 24 * 60 * 60 * 1000;
 /** Historical on purpose: the visit and its panel sit years back. */
diff --git a/tests/integration/visit-link-picker-period-search.test.ts b/tests/integration/visit-link-picker-period-search.test.ts
index 8c11213fa..82fcac854 100644
--- a/tests/integration/visit-link-picker-period-search.test.ts
+++ b/tests/integration/visit-link-picker-period-search.test.ts
@@ -58,10 +58,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const OWNER_ID = "period-search-owner";
 const DAY_MS = 24 * 60 * 60 * 1000;
 const TZ = "Europe/Berlin";
diff --git a/tests/integration/whoop-connect-ticket.test.ts b/tests/integration/whoop-connect-ticket.test.ts
index 915e88348..ce7104f65 100644
--- a/tests/integration/whoop-connect-ticket.test.ts
+++ b/tests/integration/whoop-connect-ticket.test.ts
@@ -50,10 +50,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const TEST_USER_ID = "user-whoop-connect-ticket";
 const RAW_BEARER = "hlk_whoopconnectticketintegrationrawtokenvalue00000001";
 const WHOOP_AUTH_URL = "https://api.prod.whoop.com/oauth/oauth2/auth";
diff --git a/tests/integration/withings-oauth-flow.test.ts b/tests/integration/withings-oauth-flow.test.ts
index 1ba5e6197..a95a17e71 100644
--- a/tests/integration/withings-oauth-flow.test.ts
+++ b/tests/integration/withings-oauth-flow.test.ts
@@ -52,10 +52,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const TEST_USER_ID = "user-withings-oauth-flow";
 
 const WITHINGS_OAUTH_URL =
diff --git a/tests/integration/withings-oauth.test.ts b/tests/integration/withings-oauth.test.ts
index d8275fce0..7d3d3c9fd 100644
--- a/tests/integration/withings-oauth.test.ts
+++ b/tests/integration/withings-oauth.test.ts
@@ -51,10 +51,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const TEST_USER_ID = "user-withings-oauth";
 
 const WITHINGS_TOKEN_URL = "https://wbsapi.withings.net/v2/oauth2";
diff --git a/tests/integration/withings-sync-volume.test.ts b/tests/integration/withings-sync-volume.test.ts
index c2b97d9aa..ea4069bf1 100644
--- a/tests/integration/withings-sync-volume.test.ts
+++ b/tests/integration/withings-sync-volume.test.ts
@@ -20,10 +20,6 @@ import { encrypt } from "@/lib/crypto";
 
 import { getPrismaClient, truncateAllTables } from "./setup";
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 vi.mock("@/lib/withings/client", async (importOriginal) => {
   const actual = await importOriginal<typeof import("@/lib/withings/client")>();
   return { ...actual, fetchMeasurements: vi.fn() };
diff --git a/tests/integration/workout-batch-create.test.ts b/tests/integration/workout-batch-create.test.ts
index 00e431dfd..da4fda1a3 100644
--- a/tests/integration/workout-batch-create.test.ts
+++ b/tests/integration/workout-batch-create.test.ts
@@ -56,10 +56,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 beforeEach(async () => {
   await truncateAllTables(getPrismaClient());
   cookieJar.clear();
diff --git a/tests/integration/workout-batch-enrich.test.ts b/tests/integration/workout-batch-enrich.test.ts
index 3b80f526e..d0f1838dc 100644
--- a/tests/integration/workout-batch-enrich.test.ts
+++ b/tests/integration/workout-batch-enrich.test.ts
@@ -53,10 +53,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 beforeEach(async () => {
   await truncateAllTables(getPrismaClient());
   cookieJar.clear();
diff --git a/tests/integration/workout-batch-race.test.ts b/tests/integration/workout-batch-race.test.ts
index d55aed62b..5d4cd0ac6 100644
--- a/tests/integration/workout-batch-race.test.ts
+++ b/tests/integration/workout-batch-race.test.ts
@@ -45,10 +45,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 beforeEach(async () => {
   await truncateAllTables(getPrismaClient());
   cookieJar.clear();
diff --git a/tests/integration/workout-detail-hr-series.test.ts b/tests/integration/workout-detail-hr-series.test.ts
index 7f3d904be..ac616d76e 100644
--- a/tests/integration/workout-detail-hr-series.test.ts
+++ b/tests/integration/workout-detail-hr-series.test.ts
@@ -56,10 +56,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const { GET } = await import("@/app/api/workouts/[id]/route");
 
 /**
diff --git a/tests/integration/workout-manual-entry.test.ts b/tests/integration/workout-manual-entry.test.ts
index 434d4839c..ff28f18ac 100644
--- a/tests/integration/workout-manual-entry.test.ts
+++ b/tests/integration/workout-manual-entry.test.ts
@@ -53,10 +53,6 @@ vi.mock("next/headers", async () => {
 const emitDataArrival = vi.hoisted(() => vi.fn(async () => undefined));
 vi.mock("@/lib/arrivals/emit-shared", () => ({ emitDataArrival }));
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const { POST: postBatch } = await import("@/app/api/workouts/batch/route");
 const { GET: listWorkouts } = await import("@/app/api/workouts/route");
 const { DELETE: deleteWorkout } = await import("@/app/api/workouts/[id]/route");
diff --git a/tests/integration/write-meter.test.ts b/tests/integration/write-meter.test.ts
index cd945a9c1..56b6abe57 100644
--- a/tests/integration/write-meter.test.ts
+++ b/tests/integration/write-meter.test.ts
@@ -41,10 +41,6 @@ vi.mock("next/headers", async () => {
   };
 });
 
-vi.mock("@/lib/db-compat", () => ({
-  ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
-}));
-
 const USER_ID = "user-write-meter";
 const BUCKET = `${RECORD_WRITE_BUCKET_PREFIX}:${USER_ID}`;