feat(kpi): K11 — KpiHistoryQueryService (scoped read + bucketing)

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

@@ -1,10 +1,12 @@
 using Microsoft.AspNetCore.Components.Authorization;
 using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Options;
 using ZB.MOM.WW.ScadaBridge.CentralUI.Auth;
 using ZB.MOM.WW.ScadaBridge.CentralUI.Components.Shared;
 using ZB.MOM.WW.ScadaBridge.CentralUI.ScriptAnalysis;
 using ZB.MOM.WW.ScadaBridge.CentralUI.Services;
 using ZB.MOM.WW.ScadaBridge.HealthMonitoring;
+using ZB.MOM.WW.ScadaBridge.KpiHistory;
 
 namespace ZB.MOM.WW.ScadaBridge.CentralUI;
 
@@ -51,6 +53,19 @@ public static class ServiceCollectionExtensions
         // Backs the Audit Log page's Export button via GET /api/centralui/audit/export.
         services.AddScoped<IAuditLogExportService, AuditLogExportService>();
 
+        // KPI History (M6, K11): CentralUI facade over IKpiHistoryRepository that
+        // fetches a raw series and reduces it with KpiSeriesBucketer for the trend chart.
+        //
+        // Registered with an explicit factory so the IServiceScopeFactory ctor is
+        // always chosen — KpiHistoryQueryService has a second (test-seam) ctor that
+        // takes IKpiHistoryRepository directly, and both are constructor-resolvable,
+        // so default activation would be ambiguous. The scope-factory ctor opens a
+        // fresh DbContext per query, mirroring AuditLogQueryService so a chart's
+        // auto-load never races other reads on the shared circuit-scoped context.
+        services.AddScoped<IKpiHistoryQueryService>(sp => new KpiHistoryQueryService(
+            sp.GetRequiredService<IServiceScopeFactory>(),
+            sp.GetRequiredService<IOptions<KpiHistoryOptions>>()));
+
         // OPC UA Tag Browser (Task 14): facade over CommunicationService.BrowseNodeAsync
         // that enforces the CentralUI-side Design-role trust boundary and translates
         // transport failures into typed BrowseFailure results for the dialog.