fix: apply CodeRabbit auto-fixes

launcher/test-support/immersion-db-fixture.ts

@@ -53,6 +53,7 @@ export function insertFixtureSession(dbPath: string, input: FixtureSessionInput)
   const db = new Database(dbPath, { readwrite: true });
   const stamp = String(input.startedAtMs);
   try {
+    db.run('PRAGMA foreign_keys = ON');
     let animeId: number | null = null;
     if (input.animeTitleKey) {
       const existing = db

launcher/test-support/immersion-db-schema.test.ts

@@ -5,7 +5,7 @@ import os from 'node:os';
 import path from 'node:path';
 import { Database as BunDatabase } from 'bun:sqlite';
 import { ensureSchema } from '../../src/core/services/immersion-tracker/storage.js';
-import { createImmersionDbFixture } from './immersion-db-fixture.js';
+import { createImmersionDbFixture, insertFixtureSession } from './immersion-db-fixture.js';
 
 type SchemaRow = { type: string; name: string; tbl_name: string; sql: string | null };
 
@@ -107,3 +107,35 @@ test('fixture schema stays aligned with production sync-touched tables and index
     fs.rmSync(dir, { recursive: true, force: true });
   }
 });
+
+test('fixture session inserts enforce foreign keys', () => {
+  const dir = fs.mkdtempSync(path.join(os.tmpdir(), 'subminer-fixture-foreign-keys-'));
+  const fixturePath = path.join(dir, 'fixture.sqlite');
+  try {
+    createImmersionDbFixture(fixturePath);
+    const db = new BunDatabase(fixturePath, { readwrite: true });
+    try {
+      db.run(`
+        CREATE TRIGGER remove_fixture_video
+        BEFORE INSERT ON imm_sessions
+        BEGIN
+          DELETE FROM imm_videos WHERE video_id = NEW.video_id;
+        END
+      `);
+    } finally {
+      db.close();
+    }
+
+    assert.throws(
+      () =>
+        insertFixtureSession(fixturePath, {
+          uuid: 'foreign-key-check',
+          videoKey: 'foreign-key-check',
+          startedAtMs: Date.UTC(2026, 6, 9),
+        }),
+      /FOREIGN KEY constraint failed/,
+    );
+  } finally {
+    fs.rmSync(dir, { recursive: true, force: true });
+  }
+});