podman trusts its own state DB: when a container's conmon dies without
podman observing it (cgroup-cascade SIGKILL on archipelago.service
restart, a crash), `podman ps` keeps reporting it "Up" long after the
process is gone. The reconciler NoOp'd such a zombie forever, so a dead
dependency with no published host port never recovered.
Observed live on .228 (2026-06-25): netbird-dashboard reported "Up" with
a dead State.Pid → its nginx proxy 502'd → NetBird login broke
("Unauthenticated"). The dashboard publishes no host port, so the
Running branch had nothing to probe and never recreated it.
Add a zombie guard to the Running branch: verify the recorded State.Pid
is alive (its /proc entry exists) before trusting "running"; on a
concrete dead PID, stop+remove+install_fresh from the manifest.
Conservative by design — any uncertainty (inspect failed, PID
unparseable) assumes alive, so a transient podman hiccup never destroys
a healthy container. Unit test covers live/dead/out-of-range PIDs.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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