fixes

app/core/background/convert_service.py

@@ -119,7 +119,7 @@ async def convert_loop():
             file_hash = hash_stdout.decode().split()[0]
             file_hash = b58encode(bytes.fromhex(file_hash)).decode()
 
-            if not db_session.query(StoredContent).filter(
+            if not session.query(StoredContent).filter(
                 StoredContent.hash == file_hash
             ).first():
                 new_content = StoredContent(