changed main for proper worker manager import

app/main.py

@@ -24,7 +24,7 @@ from app.core.event_hub import event_hub
 # NOTE: worker_manager is now created via async factory `get_worker_manager()`
 # Old import kept as comment for reference:
 # from app.core.worker_manager import worker_manager
-from app.core.worker_manager import get_worker_manager,worker_manager
+from app.core.worker_manager import get_worker_manager
 from app.deps import rate_limit_org, verify_api_key, check_all_services
 from app.tasks.analytics_worker import trigger_kpi_computation
 from app.service.vector_service import cleanup_expired_vectors