把 Playwright 放进 CI:最小可用配置

关键点

  1. 用 mcr.microsoft.com/playwright 镜像,浏览器已装好
  2. 缓存 ~/.cache/ms-playwright
  3. 失败时把 trace.zip 作为构建产物上传
- run: pytest -n 4 --tracing=retain-on-failure