If a release workflow fails after creating the branch (e.g. pnpm setup
failure, network error) but before creating the tag, re-triggering the
workflow previously failed at 'git push origin $BRANCH' because the
branch already existed.
Changes:
- Commit and tag: check for existing remote branch and delete it before
re-creating, so re-triggers are clean. Safe because check-tag skips
when the tag already exists — we only reach this point when the tag
does NOT exist yet.
- Create PR: guard with 'gh pr view' so a pre-existing PR from a failed
run is reused instead of causing 'pr already exists' failure.
Split the single 'git push origin $BRANCH --tags' into two pushes
(branch and tag separately) to avoid any flag ambiguity.
Hugh Hackman
496dfff41a