log file_size_in_mb in metadata

litellm/proxy/common_utils/http_parsing_utils.py

@@ -56,6 +56,9 @@ def check_file_size_under_limit(
 
     file_contents_size = file.size or 0
     file_content_size_in_mb = file_contents_size / (1024 * 1024)
+    if "metadata" not in request_data:
+        request_data["metadata"] = {}
+    request_data["metadata"]["file_size_in_mb"] = file_content_size_in_mb
     max_file_size_mb = None
 
     if llm_router is not None and request_data["model"] in router_model_names: