A six-test bats suite that validates what install_via_quadlet (Phase 3.2)
is supposed to leave behind:
* `.container` unit on disk in $XDG_CONFIG_HOME/containers/systemd/
with [Container] / [Service] / [Install] sections, Image= present,
and Restart=on-failure (the backend invariant — companions use Always)
* Phase 3.4 cross-check: any unit with HealthCmd= must also emit
Notify=healthy, otherwise systemctl start won't gate on health
* `systemctl --user is-active` returns 0 for the .service
* podman shows the container running
* the container's cgroup is under user.slice/, NOT under
archipelago.service — the kernel-level proof that FM3 cgroup
cascade SIGKILL is structurally fixed for this container
Auto-skips on every test when no backend Quadlet units exist (today's
default state, use_quadlet_backends=false) — so the suite is a no-op
on current fleet boxes and turns into a hard regression gate the
moment anyone flips the flag and reinstalls.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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