Recorders are now physical capture ports, not user-created rows:
- migration 036: label, enabled, auto_provisioned + UNIQUE(node_id,device_index)
(the structural fix that makes two recorders sharing a port impossible)
- mam-api: auto-provision one recorder row per port from heartbeat capabilities
(reconcileRecordersForNode); create-once, never overwrites operator config
- mam-api: POST /:id/enable + /:id/disable (provision/teardown standby sidecar);
PATCH accepts label; config persists across enable/disable
- node-agent: freeCapturePort() force-removes any container on a capture port
before standby/start — eliminates the EADDRINUSE collisions
- web-ui: recorder menu grouped by node (online/offline), Enable/Disable toggle,
per-recorder config modal (codec/bitrate/growing/label/project), friendly
label over hardware name, no destructive delete
Fixes the delete/recreate churn that orphaned standby sidecars and collided on
capture ports during this session's outage.
