The reviewer-brief pins move from the table in test/review-packets-removed.test.ts to
test/fixtures/review-pins/{files,replays,brief-bodies}/*.json, and the harness pins from
scripts/harness-version.json to scripts/harness-pins/<path>.json. Every entry is ported
unchanged. New tests prove a stale pin still fails and that two repins of different pins
merge cleanly with a real git merge-tree.
Co-authored-by: capy-ai[bot] <230910855+capy-ai[bot]@users.noreply.github.com>