feat(bench): 构建引擎基准套件 —— 把一次性脚本变成跨平台、可扩展的测量设施 (2026.8.12.1) - #423

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