* Create frigate and go2rtc runtime users in the image
* Add single fix-ownership helper for volume permission migration
* Add init-usermod oneshot for PUID and PGID remapping
* Chown newly created runtime directories to the frigate user
* Run sentinel-guarded ownership sweep during prepare
* Add host-side volume permission migration script
* Guard log directory ownership for user-mode startup
* Fall back to plain s6-log when running without root
* Assert PUID remapping and sweep sentinel in CI smoke test
* Skip the ownership sweep in the devcontainer
* Pin FRIGATE_RUN_AS_ROOT in ownership tests
* Do not record the sweep as complete when a chown failed
* Validate PUID and PGID in the migration script
* Treat a failed ownership scan as an incomplete sweep
* Reject PUID and PGID of 0 during remapping
* Handle symlinks, dry runs, and sentinel write failures in the sweep
* Treat an absent sweep root as an incomplete sweep
