feat(kpi): K9 — SiteHealth sample source (per-site, from aggregator)

src/ZB.MOM.WW.ScadaBridge.HealthMonitoring/ServiceCollectionExtensions.cs

@@ -3,6 +3,7 @@ using Microsoft.Extensions.DependencyInjection.Extensions;
 using Microsoft.Extensions.Hosting;
 using Microsoft.Extensions.Logging;
 using Microsoft.Extensions.Options;
+using ZB.MOM.WW.ScadaBridge.Commons.Interfaces.Kpi;
 
 namespace ZB.MOM.WW.ScadaBridge.HealthMonitoring;
 
@@ -61,6 +62,14 @@ public static class ServiceCollectionExtensions
         services.AddSingleton<ICentralHealthAggregator>(sp => sp.GetRequiredService<CentralHealthAggregator>());
         services.AddHostedService(sp => sp.GetRequiredService<CentralHealthAggregator>());
         services.AddHostedService<CentralHealthReportLoop>();
+
+        // M6 "KPI History & Trends" (K9): per-site Site Health KPI sample source.
+        // Reads the in-memory central aggregator (a singleton) rather than a
+        // repository; registered Scoped to match the recorder's per-tick scope
+        // and the other M6 sample sources (a scoped source over a singleton
+        // dependency is fine — no captive dependency).
+        services.TryAddEnumerable(
+            ServiceDescriptor.Scoped<IKpiSampleSource, Kpi.SiteHealthKpiSampleSource>());
         return services;
     }