pop litellm_logging_obj from request_data before callback loop

litellm/proxy/utils.py

@@ -1729,6 +1729,9 @@ class ProxyLogging:
                 original_exception=original_exception,
             )
 
+        # Remove before callbacks iterate — not serialisable
+        request_data.pop("litellm_logging_obj", None)
+
         # Track the first HTTPException returned or raised by any callback
         transformed_exception: Optional[HTTPException] = None