style: apply prettier across the tree

One-shot prettier pass so the new format:check gate starts from a clean
baseline. Formatting only — no behaviour change. Generator-owned and
vendored artifacts stay untouched via .prettierignore.

src/app/api/fhir/__tests__/route.test.ts

@@ -17,8 +17,7 @@ vi.mock("@/lib/db-compat", () => ({
   ensureDbCompatibility: vi.fn().mockResolvedValue(undefined),
 }));
 vi.mock("@/lib/fhir/rest", async (importOriginal) => {
-  const actual =
-    await importOriginal<typeof import("@/lib/fhir/rest")>();
+  const actual = await importOriginal<typeof import("@/lib/fhir/rest")>();
   return { ...actual, loadFhirContext: vi.fn() };
 });
 vi.mock("@/lib/fhir/resources", () => ({