Joseph Doherty e14433cd64 feat(kpi): K5 — Host central wiring + KpiHistoryRecorder cluster singleton + appsettings (not readiness-gated) ...

Wire the M6 KPI History recorder into the central composition path:
- Program.cs: call services.AddKpiHistory(configuration) on the central-only
  branch alongside AddNotificationOutbox/AddAuditLog/AddSiteCallAudit.
- AkkaHostedService.cs: register KpiHistoryRecorderActor as a central,
  non-role-scoped ClusterSingletonManager + ClusterSingletonProxy + a
  PhaseClusterLeave CoordinatedShutdown graceful-stop drain (singleton name
  'kpi-history-recorder'), copied/adapted from the audit-log-purge block.
- appsettings.Central.json (Host + docker + docker-env2 central nodes): add a
  ScadaBridge:KpiHistory section (SampleInterval 00:01:00, RetentionDays 90,
  PurgeInterval 1.00:00:00, DefaultMaxSeriesPoints 200).

KPI history is observability/best-effort and MUST NOT gate readiness: the
recorder is deliberately NOT added to RequiredSingletonsHealthCheck or any
other readiness gate.

2026-06-17 20:20:34 -04:00

..

appsettings.Central.json

feat(kpi): K5 — Host central wiring + KpiHistoryRecorder cluster singleton + appsettings (not readiness-gated)

2026-06-17 20:20:34 -04:00