Its setup check grepped omarchy-setup-system for config/snapper.sh, which
the config phase has run since the install was split into phases.
The omarchy-pkgs and omarchy-iso lookups also missed the sibling checkout
layout that f375113f taught config-test about, so they failed on machines
where config-test passed. Both now take an explicit path override.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>