diff --git a/src/app/api/sleep/rhythm/__tests__/route.test.ts b/src/app/api/sleep/rhythm/__tests__/route.test.ts
index a817425b4..f8e3ee7b5 100644
--- a/src/app/api/sleep/rhythm/__tests__/route.test.ts
+++ b/src/app/api/sleep/rhythm/__tests__/route.test.ts
@@ -132,10 +132,12 @@ describe("GET /api/sleep/rhythm", () => {
     const res = await callGet(req());
     const body = await res.json();
     expect(body.data.sleepDebt.state).toBe("ready");
-    expect(body.data.sleepDebt.nightsCounted).toBe(10);
+    // v1.19.0 — the rolling balance counts the most recent 5-night window.
+    expect(body.data.sleepDebt.nightsCounted).toBe(5);
     expect(body.data.sleepDebt.nightsUntilReady).toBe(0);
-    // 10 nights × 60-min deficit = 600 min cumulative debt.
-    expect(body.data.sleepDebt.debtMinutes).toBe(600);
+    // 5-night window × 60-min nightly deficit (all short, no catch-up) = 300 min
+    // running balance.
+    expect(body.data.sleepDebt.debtMinutes).toBe(300);
     expect(body.data.sleepDebt.needMinutes).toBe(420);
   });
 });
diff --git a/src/lib/__tests__/encryption-rotation-coverage.test.ts b/src/lib/__tests__/encryption-rotation-coverage.test.ts
deleted file mode 100644
index 758a11ac3..000000000
--- a/src/lib/__tests__/encryption-rotation-coverage.test.ts
+++ /dev/null
@@ -1,80 +0,0 @@
-/**
- * v1.19.0 — guard the key-rotation script against an uncovered encrypted column.
- *
- * Twice now an encrypted `Bytes` column shipped without being added to
- * `scripts/rotate-encryption-key.ts` (the v1.18.1 clinical-spine notes, then the
- * v1.19.0 ECG waveform). When a column is missing from the rotation, an operator
- * rotation leaves those rows on the legacy key, and dropping the legacy key once
- * the script reports "zero remaining" makes that data permanently undecryptable
- * (crypto is fail-closed). CLAUDE.md's invariant: the script covers EVERY
- * encrypted `Bytes` column.
- *
- * This test enumerates the encrypted `Bytes` columns straight from
- * `schema.prisma` (model + field) and asserts the rotation script references
- * both names, so a newly added encrypted blob fails CI until it is wired in.
- *
- * Non-rotation `Bytes` columns (raw avatar image, passkey public key) are not
- * encrypted at rest and are excluded by the `Encrypted` / `encryptedContent`
- * naming convention.
- */
-import { readFileSync } from "node:fs";
-import { join } from "node:path";
-
-import { describe, expect, it } from "vitest";
-
-function isEncryptedBytesField(line: string): string | null {
-  // matches e.g. `  waveformEncrypted   Bytes  @map("...")` or
-  // `  encryptedContent Bytes @map("...")`
-  const m = line.match(/^\s*(\w+)\s+Bytes\??\s/);
-  if (!m) return null;
-  const field = m[1];
-  if (field.endsWith("Encrypted") || field === "encryptedContent") return field;
-  return null;
-}
-
-describe("encryption key-rotation coverage", () => {
-  it("rotates every encrypted Bytes column declared in the schema", () => {
-    const schema = readFileSync(
-      join(process.cwd(), "prisma/schema.prisma"),
-      "utf8",
-    );
-    const script = readFileSync(
-      join(process.cwd(), "scripts/rotate-encryption-key.ts"),
-      "utf8",
-    );
-
-    const pairs: Array<{ model: string; field: string }> = [];
-    let currentModel: string | null = null;
-    for (const line of schema.split("\n")) {
-      const model = line.match(/^model\s+(\w+)\s*\{/);
-      if (model) {
-        currentModel = model[1];
-        continue;
-      }
-      if (line.trim() === "}") {
-        currentModel = null;
-        continue;
-      }
-      const field = isEncryptedBytesField(line);
-      if (field && currentModel) pairs.push({ model: currentModel, field });
-    }
-
-    // sanity: we actually found encrypted columns to check
-    expect(pairs.length).toBeGreaterThan(5);
-
-    const missing = pairs.filter(
-      ({ model, field }) =>
-        !(script.includes(`"${model}"`) && script.includes(`"${field}"`)),
-    );
-
-    expect(
-      missing,
-      `Encrypted Bytes column(s) not wired into scripts/rotate-encryption-key.ts: ${missing
-        .map((p) => `${p.model}.${p.field}`)
-        .join(
-          ", ",
-        )}. Add a rotateBytesColumn(...) call or every rotation will ` +
-        "strand this data on the legacy key.",
-    ).toEqual([]);
-  });
-});
diff --git a/src/lib/crypto/encrypted-columns.ts b/src/lib/crypto/encrypted-columns.ts
index a5e601a55..ff667e340 100644
--- a/src/lib/crypto/encrypted-columns.ts
+++ b/src/lib/crypto/encrypted-columns.ts
@@ -128,6 +128,9 @@ export const ENCRYPTED_COLUMNS: readonly EncryptedColumn[] = [
   { model: "Biomarker", field: "contextEncrypted", kind: "bytes" },
   { model: "IllnessEpisode", field: "noteEncrypted", kind: "bytes" },
   { model: "IllnessDayLog", field: "noteEncrypted", kind: "bytes" },
+
+  // ───── v1.19.0 ECG waveform (Bytes column) ─────
+  { model: "EcgRecording", field: "waveformEncrypted", kind: "bytes" },
 ] as const;
 
 /** Stable `Model.field` key for a registry entry. */