Run over SSH with no OMARCHY_PATH, the acceptance runner defaulted it to
its own root — wrong in both sync modes omarchy-iso-test uses. With only
test/ synced, the root has no shell or install manifests: omarchy-shell
refuses every call and the package audit passes vacuously against an empty
manifest. With a full tree synced, the path disagrees with the config path
the session shell was started from, and since qs matches instances by that
path, every omarchy-shell call reads as "not running".
The suite acts on the running session, so ask the user manager for the
session's own OMARCHY_PATH first, then fall back to this checkout, then to
the installed tree.