AI Implementation feature(820): Project Scaffold and Platform Foundations (#1)

tests/backend/db-helper.ts

@@ -0,0 +1,11 @@
+import { INestApplication } from '@nestjs/common';
+import { DatabaseInitService } from '../../backend/src/database/database-init.service';
+
+/**
+ * Await database initialization (migrations + seed verification) on the
+ * given Nest app. Without this, integration tests that hit controllers
+ * will hit a fresh `:memory:` SQLite database with no tables.
+ */
+export async function initDb(app: INestApplication): Promise<void> {
+  await app.get<DatabaseInitService>(DatabaseInitService).init();
+}