fix: wait for req socket send to make sure we dont stay stuck - if there's no REP this would be awaited forever.

ref: N25B-205

src/control_backend/api/v1/endpoints/command.py

@@ -17,6 +17,5 @@ async def receive_command(command: SpeechCommand, request: Request):
     topic = b"command"
     pub_socket: Socket = request.app.state.internal_comm_socket
     pub_socket.send_multipart([topic, command.model_dump_json().encode()])
-    
 
     return {"status": "Command received"}