Resolves#50069
Omarchy 4 ships its own /etc/os-release with ID=omarchy, where earlier
versions inherited ID=arch from Arch Linux. Since HostLinuxOSs and
HOST_LINUX_PLATFORMS gate nearly every Linux check, these hosts had
empty vitals and software inventory, were missed by linux-scoped
policies and labels, had no disk encryption or key escrow, and lost Run
script in the UI (the API was unaffected).
Add "omarchy" to HostLinuxOSs, HostNeitherDebNorRpmPackageOSs (pacman-
based), IsLUKSSupported, HOST_LINUX_PLATFORMS,
DISK_ENCRYPTION_SUPPORTED_LINUX_PLATFORMS, and the Vitals
disk-encryption tooltip. Regenerate understanding-host-vitals.md.
Aggregate Omarchy onto the "Arch Linux" / "rolling" OS inventory row,
where these hosts sat before quattro. Unlike CachyOS, Omarchy reports a
real release number rather than BUILD_ID=rolling, so the version is
pinned after parsing instead of rewriting the ingested build value.
Also add a fleetd test container, built on archlinux since Omarchy
publishes no image.
Juan Fernandez
60ad78f897