Summary:
- recorded v0.9.1 candidate proof as passed
- moved the active release goal to cut-ready
- documented the generated badge drift found and resolved by #749

Validation:
- cargo xtask release-evidence --version 0.9.1 --patch --dry-run --summary
- cargo xtask adoption-regression
- cargo xtask adoption-regression --format json
- cargo xtask claim-proof --all-stable
- cargo xtask user-path-smoke
- cargo xtask check-no-panic-family
- cargo xtask claim-report --check-public-claims
- cargo xtask contract-packs --check
- cargo +nightly xtask pr-lite
- cargo xtask pr
- hosted PR and perf checks passed