fix: make startup and shutdown event handlers async in common provider

- Fix TypeError: object NoneType can't be used in 'await' expression
- FastAPI requires event handlers to be async functions
- This was blocking the entire application startup sequence
- Fixes the issue where message queue consumers were not starting properly

apps/devops/app/providers/common.py

@@ -11,13 +11,13 @@ def register(app):
     # This hook ensures that a connection is opened to handle any queries
     # generated by the request.
     @app.on_event("startup")
-    def startup():
+    async def startup():
         pass
 
     # This hook ensures that the connection is closed when we've finished
     # processing the request.
     @app.on_event("shutdown")
-    def shutdown():
+    async def shutdown():
         pass