The profile shipped boot configs and the package list but lacked the
mkinitcpio archiso configuration, so mkarchiso built a stock initramfs
with no archiso hook. At boot the kernel honoured archisosearchuuid/
archisobasedir but nothing knew how to find and mount airootfs.sfs, so
switch-root failed and the live medium dropped to emergency mode.
Add the canonical releng pieces:
- airootfs/etc/mkinitcpio.conf.d/archiso.conf (HOOKS incl. archiso)
- airootfs/etc/mkinitcpio.d/linux.preset (builds initramfs-linux.img)
- mkinitcpio{,-archiso,-nfs-utils} in packages.x86_64
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
