AUR publish failure

[github-actions]

Publishing v0.8.1 to the AUR failed. The GitHub release is unaffected — only the Arch package is stale. Re-run the Publish to AUR workflow with version 0.8.1 once the AUR is reachable.

[jeremy]

Duplicate of #602, which is the canonical AUR-publish tracker.

This was opened by release.yml when v0.8.1's AUR publish failed. Both the
release and recovery workflows deduped on --search "in:title $TITLE", and
I had retitled #602 — so the lookup missed and filed this instead of commenting
there.

Fixed in #609: dedup is now by the aur-publish label, which survives
retitling, shared by both workflows, and fails closed rather than filing a
duplicate when the lookup errors. #602 carries the label and the notifier was
verified against live GitHub to resolve to it.

Closing as a duplicate — the recovery work is tracked in #602.