feat: rename ntu img to ruby

utils/completion_reward.py

@@ -148,6 +148,8 @@ class CompletionReward:
         return gr.Image(public_url, visible=True, elem_id="certificate")
 
     def to_dict(self):
+        logging.warning(f"OpenAI response time: {self.openai_response_time}")
+        logging.warning(f"OpenAI response time type: {type(self.openai_response_time)}")
         return {
             "player_backend_user_id": self.player_backend_user_id,
             "player_name": self.player_name,