ci: 修复自托管 CI 的依赖同步与 checkout 中断，Linux/Windows 均跑通 - #46

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/upload-artifact@v4, mickem/clean-after-action@v1. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/