fix: typing problem in tests

Author: andrei-rusu

tests/evaluators/test_evaluator_methods.py

@@ -1560,4 +1560,5 @@ async def capture_chat_completions(**kwargs: Any) -> Any:
 
             # Verify evaluation result
             assert result.score == 0.8
+            assert isinstance(result.details, LLMJudgeJustification)
             assert result.details.justification == "Good response"