0.4.2

What's fixed

• Stop the runner container before clearing .runner for workdir reconfigure
• Fail closed if agent workFolder does not match the host bind after start
• Create missing host dirs via the narrowest bind root (/srv, /mnt, …) instead of always mounting /
• Typed ErrVolumeFileNotFound (no fragile exit 1 string matching); hard read errors are not cached
• UI default workdir hint uses the same normalized name as the backend
• Pipeline unit tests via a workdirHost seam; remove unused VolumeMountpoint

Home Assistant users: update to ghcr.io/dchote/github-runner-addon:0.4.2.

See CHANGELOG.