pre-push-parity

Run the CI gates locally before pushing, so failures surface in seconds instead of one CI cycle at a time. Enumerates the checks in .github/workflows/, runs the locally-runnable subset in CI's order, and pins the local-vs-CI delta as a memory the first time you work in a repo. Use before git push / opening a PR, or when CI just failed on something your local gate missed. Triggers on "pre-push", "before push", "ci…