v1.11.2

Fixed

• The docs index has its "Quick start" heading back. The 1.11.1 rewrite
  dropped it, which broke the #quick-start anchor that mcpscore.dev's
  footer links to and that the production smoke test follows; the site went
  red the next morning. Docs only, no engine change.

Changed

• Docs navigation regrouped. The rules reference moved to a Reference
  group beside the CLI reference, and the stability contract sits with the
  methodology under Scoring.
• Docs favicon is the new brand mark, the ring with a check.
• One ruff, not two. The pre-commit ruff hooks now run the ruff that
  uv.lock pins instead of a separately pinned ruff-pre-commit release, the
  drift test that policed the two copies is gone, and the CI lint job installs
  the project with uv so it runs that same ruff. A Dependabot bump of ruff is
  now the whole update. Developer tooling only.