qmdctl-watch-collections on artbird calls qmd update which runs git operations against GitHub for the content-topics collection. The artbird user's SSH key is missing or not registered as a deploy key, causing git@github.com: Permission denied (publickey). Syncthing is also retrying failed deletes in the same folder - a secondary symptom that should resolve once sync recovers.
All steps are remote ops via SSH to artbird. No code changes.