Fix: Clear metadata cache when the filename(s) change (#5957)

* Update doc modified time upon move and rename

* Clear the cached metadata if the filename(s) have been changed

---------

Co-authored-by: shamoon <4887959+shamoon@users.noreply.github.com>

src/documents/caching.py

@@ -189,6 +189,11 @@ def refresh_metadata_cache(
     cache.touch(doc_key, timeout)
 
 
+def clear_metadata_cache(document_id: int) -> None:
+    doc_key = get_metadata_cache_key(document_id)
+    cache.delete(doc_key)
+
+
 def get_thumbnail_modified_key(document_id: int) -> str:
     """
     Builds the key to store a thumbnail's timestamp