pi-anthropic-messages

Cut a new pi-anthropic-messages release. Promotes `## [Unreleased]` in CHANGELOG.md to a versioned section, bumps `package.json`, commits, tags `v<version>`, and pushes — which triggers the Release workflow that publishes `@blackbelt-technology/pi-anthropic-messages` to npm and creates a draft GitHub Release. Use when the user says "cut a release", "release vX.Y.Z", "publish a new version", "tag a release".

Revoke or rollback a pi-anthropic-messages release. Deletes the GitHub Release (draft or published), removes the git tag locally and on origin, deprecates the npm package version (since `npm unpublish` is blocked after 72h / for packages with dependents), and optionally reverts the `chore(release): vX.Y.Z` commit. Use when the user says "revoke release", "rollback release", "delete release", "unpublish vX.Y.Z", "yank release".