steve ee410fcf95 alert: construct + run engine; expose hub to handlers ...

- Construct notification.NewHub and alert.NewEngine at boot in cmd/server/main.go
- Start go alertEngine.Run(ctx) after construction, before the HTTP listener
- Wire AlertEngine and NotificationHub into rmhttp.Deps (fields already existed)
- Remove the TODO(G1) in the offline sweeper; now calls NotifyHostOffline per ID

2026-05-04 20:32:10 +01:00

..

main.go

alert: construct + run engine; expose hub to handlers

2026-05-04 20:32:10 +01:00