chore: better comment on _serialize_value

Author: abhishekg999

src/judgeval/data/trace.py

@@ -72,7 +72,7 @@ def safe_stringify(self, output, function_name):
         return None
 
     def _serialize_value(self, value: Any) -> Any:
-        """Helper method to serialize output data safely."""
+        """Helper method to deep serialize a value safely supporting Pydantic Models / regular PyObjects."""
         if value is None:
             return None