fix: run app entrypoint on Railway

Use python main.py for Railway deploys so PORT is read by app code.

Author: kodjima33

railway.toml

@@ -1,5 +1,5 @@
 [deploy]
-startCommand = "uvicorn main:app --host 0.0.0.0 --port $PORT"
+startCommand = "python main.py"
 
 # Persistent storage for user tokens and sessions
 [[deploy.volumes]]