mam-api self-heartbeat now reads NODE_HOSTNAME so primary rows survive container restarts instead of resurrecting with the random container ID. test-cluster.sh rewritten to use jq (the python f-strings had a parse bug that silently passed the IP check) and limited the docker-bridge alarm to 172.17.x since the user LAN occupies 172.18.0.0/16.
Resolves the host's primary LAN address with `ip route get` so the
node-agent reports it in the heartbeat instead of a docker bridge IP.
Adds BMD_MODEL forwarding so the recorder UI knows which card to draw,
and reads back the agent's /health response to confirm the resolved IP.
