Detect gated status on older Hub clients

backend_router.py

@@ -286,14 +286,14 @@ class BackendRouter:
             info = self.api.model_info(
                 repo_id=model_id,
                 repo_type="model",
-                files_metadata=True,
             )
-            files = [sibling.rfilename for sibling in (info.siblings or [])]
-            gated = info.gated or False
+            siblings = getattr(info, "siblings", []) or []
+            files = [sibling.rfilename for sibling in siblings]
+            gated = getattr(info, "gated", False) or False
             file_sizes = {
                 sibling.rfilename: int(sibling.size)
-                for sibling in (info.siblings or [])
-                if sibling.size is not None
+                for sibling in siblings
+                if getattr(sibling, "size", None) is not None
             }
         except (AttributeError, TypeError):
             # Keep compatibility with lightweight/fake API clients and older