Fix not-stopping on loop

trap/socket_forwarder.py

@@ -156,6 +156,9 @@ class WsRouter:
     async def prediction_forwarder(self):
         logger.info("Starting prediction forwarder")
         while self.is_running.is_set():
+            # timeout so that if no events occur, loop can still stop on is_running
+            has_event = await self.prediction_socket.poll(timeout=1)
+            if has_event:
                 msg = await self.prediction_socket.recv_string()
                 logger.debug(f"Forward prediction message of {len(msg)} chars")
                 WebSocketPredictionHandler.write_to_clients(msg)