Update openai_ondemand_adapter.py

openai_ondemand_adapter.py

@@ -676,7 +676,7 @@ def handle_non_stream_request(initial_apikey, initial_session_id, query_str, end
                         "choices": [{"index": 0, "message": {"role": "assistant", "content": ""}, "finish_reason": "length"}], 
                         "usage": {},
                         "code": final_error_code 
-                    }), 500 # Status 500 as requested
+                    }), 504 # Status 504 as requested
                 logging.info(f"【同步请求】空回复，将在1秒后重试下一个Key。当前总尝试 {empty_retry_attempt_num}/{max_empty_response_retries}")
                 time.sleep(1)