The gateway now monitors alarms continuously, independent of any client
session, and fans the feed out to every client.
GatewayAlarmMonitor is an always-on hosted service that owns one
gateway-managed worker session dedicated to alarms: it subscribes the
configured provider, caches the active-alarm set from the worker's
transition events (reconciled periodically against the worker's
authoritative snapshot), re-opens the session if the worker faults,
and broadcasts to all subscribers.
The new session-less StreamAlarms RPC opens with the current
active-alarm snapshot, then streams live transitions; any number of
clients fan out from the single monitor without opening a worker
session. AcknowledgeAlarm is now session-less and routes through the
monitor. The session-scoped QueryActiveAlarms RPC and the per-session
alarm auto-subscribe hook are removed, along with the now-dead
IAlarmRpcDispatcher trio; the dashboard Alarms tab reads the monitor's
in-process cache directly.
This intentionally reverses the v1 "no multi-subscriber fan-out"
decision for the alarm subsystem.
Contracts regenerated; gateway, dashboard and tests build clean,
94 alarm-affected tests pass, and the monitor is verified live.
Language-client stubs are regenerated in a follow-up change.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Joseph Doherty