harness: 정합성 게이트 도입 + 하네스 불일치 스왑 (BIOP02-100 / BIOP01-64·65·66·71·72·73) - #5

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@v4, actions/setup-python@v5. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/