Merge prgs/master into feat/issue-405-mutation-capability-proof and keep
both reviewer mutation-capability proof and post-merge cleanup proof rules.
Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>
Adds mutation-capability table validation so review_pr cannot authorize
merge or delete mutations without their own exact capability rows.
Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>