Update app.py

app.py

@@ -42,9 +42,9 @@ chat_service = ChatService(model_service, data_service, faq_service)
 # API endpoints
 @app.post("/api/chat")
 async def chat_endpoint(
+    background_tasks: BackgroundTasks,
     user_input: UserInput,
-    api_key: str = Depends(get_api_key),
-    background_tasks: BackgroundTasks
+    api_key: str = Depends(get_api_key)
 ):
     try:
         response, updated_history, search_results = await chat_service.chat(