Align END log format with validator: use score field

inference.py

@@ -213,7 +213,7 @@ def log_end(success: bool, steps: int, rewards: List[float], final_score: float)
 
     rewards_text = ",".join(f"{reward:.2f}" for reward in rewards)
     print(
-        f"[END] success={str(success).lower()} steps={steps} rewards={rewards_text} final_score={final_score:.4f}",
+        f"[END] success={str(success).lower()} steps={steps} score={final_score:.2f} rewards={rewards_text}",
         flush=True,
     )