claw-ctx v6.6.1: fix release-lag assertions + js-yaml security

v6.6.1 (2026-08-15)

Fixed

• Version assertion drift: 2 tests (version-bump / plugin-contract) expected 6.5.1 but actual was 6.6.0 — v6.6.0 released with these failing; assertions synced to 6.6.0 in 0673ea2
• js-yaml security upgrade: devDependency bumped 4.3.0 → 4.3.1 (PR #7, dependabot npm_and_yarn group)

Changed

• Version: 6.6.0 → 6.6.1

Tests

• 92 files / 1172 tests / 5 skipped / 0 failed (assertion-sync verification)