fix: error raise status code not exist (#888)

api/core/third_party/spark/spark_llm.py

         data = json.loads(message)
         code = data['header']['code']
         if code != 0:
-            self.queue.put({'error': f"Code: {code}, Error: {data['header']['message']}"})
+            self.queue.put({
+                'status_code': 400,
+                'error': f"Code: {code}, Error: {data['header']['message']}"
+            })
             ws.close()
         else:
             choices = data["payload"]["choices"]