Fix metadata loading upon `Resource.objects()`

Since !12 (closed) is most probably not enough, I now simply allow for the new pattern to match.

src/coscine/resource.py

@@ -440,7 +440,8 @@ class Resource:
             path = urllib.parse.quote("/" + data["Path"], safe="")
             metadata: dict = {}
             for meta in metadata_storage:
-                if list(meta.keys())[0].endswith(f"@path={path}"):
+                key: str = list(meta.keys())[0]
+                if key.endswith(f"@path={path}") or f"/{path}/@type=metadata" in key:
                     metadata = meta
                     break
             objects.append(FileObject(self, data, metadata))