fix(proxy): keep the direct deferred-logging attribute write

The Any-reduction pass routed the deferred-logging teardown through a new
Logging.clear_deferred_logging_enqueue() helper. Callers in the request path
hand this function a MagicMock in tests, which absorbs the method call and
leaves _enqueue_deferred_logging set, so three deferred-guardrail-logging
assertions failed. Restore the direct attribute write and drop the helper.

litellm/litellm_core_utils/litellm_logging.py

@@ -563,9 +563,6 @@ class Logging(LiteLLMLoggingBaseClass):
         self._defer_async_logging: bool = False
         self._enqueue_deferred_logging: Callable[[], None] | None = None
 
-    def clear_deferred_logging_enqueue(self) -> None:
-        self._enqueue_deferred_logging = None
-
     def process_dynamic_callbacks(self):
         """
         Initializes CustomLogger compatible callbacks in self.dynamic_* callbacks

litellm/proxy/common_request_processing.py

@@ -3046,7 +3046,7 @@ class ProxyBaseLLMRequestProcessing:
         _enqueue_fn: Final = getattr(logging_obj, "_enqueue_deferred_logging", None)
         if _enqueue_fn is None:
             return
-        logging_obj.clear_deferred_logging_enqueue()
+        logging_obj._enqueue_deferred_logging = None
         if exception_raised:
             return
         try: