fix: Correctly close the initializeServices function in app.ts

- Fixed a syntax error by properly closing the initializeServices function.
- This change ensures that the application initializes services correctly without any runtime issues.

backend-node/src/app.ts

@@ -432,6 +432,6 @@ async function initializeServices() {
   } catch (error) {
     logger.warn("⚠️ AI 어시스턴트 기동 스킵:", error);
   }
-});
+}
 
 export default app;