W-010: create releases from version tags

[antst]

Summary

• trigger releases from pushed v* tags
• validate the tag against the package version and derive stable/prerelease npm dist-tags
• create an idempotent GitHub Release from the matching changelog entry, with generated-note fallback
• publish to npm with provenance after the gate and release creation
• document the tag-push release procedure

Verification

• pnpm gate:docker (3 test files, 15 tests passed)
• actionlint .github/workflows/ci.yml .github/workflows/release.yml
• metadata checks: stable -> latest; rc.1 -> rc; beta.2 -> beta; changelog extraction for 0.1.2

[pkg-pr-new]

Open in StackBlitz

npm i https://pkg.pr.new/@antst/roller@7

commit: dac4341