Close the two gaps vs recipe-maintainer's recipe-upgrade-plan:
- Per-recipe release-notes registry at cc-ci-plan/upstream/<recipe>.md (discover the source repo +
releases/changelog URL for each image once, persist+commit, reuse) — fetch release notes FROM those
URLs instead of rediscovering ad-hoc each run. Format doc + cryptpad seed included.
- Explicitly read the recipe's README for shipped upgrade/migration notes.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
