dot-skill v2：Node 单栈 + 证据脊柱 + 渲染 + 渠道与同意 + 审计（重建版） - #185

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-node@v4. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/