* [AI] Add post-merge hook to auto-install when yarn.lock changes
Mirrors the existing post-checkout hook behavior: after a git pull or
merge, if yarn.lock changed between ORIG_HEAD and HEAD, automatically
runs yarn install to keep dependencies in sync.
https://claude.ai/code/session_01JHoMhGANLTc1q67s1dUHrt
* Add release notes for PR #7248
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Co-authored-by: Claude <noreply@anthropic.com>
Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>