feat: 编译器是能力,不是配置 —— payload 版本权威 + specs 污染 + xlings pin (2026.8.8.2) - #378

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