Fleet/keep/middleware NATS_URL lists 10.10.10.21–23. Product streams
are replicas=3. px-worker worm/tree run on that cluster. Backup timer
and px-worker uptime watch are on. MOCK_VERAE and Zapier push unchanged.
Restarts crashed units unless the admin console paused or stopped
them. Fleet writes per-instance intent.json. Tested on 138:
crash-restart, pause-hold, watch respawn of keep.
