Run SwiftFormat and SwiftLint on staged Swift files in the pre-commit
hook (formatting-and-linting.md), gracefully skipping when a tool is
absent since CI re-runs both. Enforce the Conventional Commits subject
format and the 72-character subject limit in the commit-msg hook
(commits.md). Correct the pre-push comment that named the removed ci.yml.
Reject Cursor co-author trailers, cursor.com agent emails, and machine
attribution tells in commit messages and staged content, plus a Cursor
author or committer identity. Add a workflow enforcing the same rule
server-side on push and pull request.
