publish:publint and publish:attw only ran in the tag-triggered publish
job, so a packaging break stayed green until release. Add publint to
build (offline, fast, packs the built dist). attw stays in publish,
where the full resolution matrix is worth the cost.
The runner now lives on Gitea; move the workflow to .gitea/workflows/ and
delete the stale .github copy (Gitea ignores .github/, so it's drift bait).
Use the native gitea.ref context for the tag gate; keep actions pinned to
their GitHub sources (the runner has internet + caches them). Drop the
upload-artifact coverage step in favour of the self-hosted webserver plan
tracked in the backlog. Add an empty-secret gate as publish's first step so
a tag push without NPM_TOKEN fails loudly instead of silently no-oppping.