Create app/broker.py

app/broker.py

@@ -1,9 +1,7 @@
 """
 A singleton message broker for the application.
-
 This ensures that the same asyncio.Queue instance is shared across all parts
-of the application, including background tasks and API request handlers,
-solving state-sharing issues in ASGI lifecycles.
+of the application, including background tasks and API request handlers.
 """
 import asyncio
 
@@ -12,5 +10,4 @@ class SignalBroker:
         self.queue = asyncio.Queue()
 
 # Create a single, global instance of the broker.
-# When any file imports 'signal_broker', they will get this exact same object.
 signal_broker = SignalBroker()