Review findings on #7586:
- validate an explicit release version before comparing; the shared
comparator never throws, so 999.bad previously reached every manifest
- ci-release-notes imports the comparator by relative path: the
release_github job runs without bun install
- route Bun cache pruning through compareVersions and delete
compareSemverLikeVersions
- regression test for the release-version guard
metaphorics
726698e2b0