feat(vtags): wire IHistoryWriter through DriverHostActor (Null default; durable sink infra-gated) (H5d, stillpending §1)

src/Server/ZB.MOM.WW.OtOpcUa.Runtime/ServiceCollectionExtensions.cs

@@ -13,6 +13,7 @@ using ZB.MOM.WW.OtOpcUa.Configuration;
 using ZB.MOM.WW.OtOpcUa.Core.Abstractions;
 using ZB.MOM.WW.OtOpcUa.Core.AlarmHistorian;
 using ZB.MOM.WW.OtOpcUa.Core.Scripting;
+using ZB.MOM.WW.OtOpcUa.Core.VirtualTags;
 using ZB.MOM.WW.OtOpcUa.OpcUaServer;
 using ZB.MOM.WW.OtOpcUa.Runtime.Drivers;
 using ZB.MOM.WW.OtOpcUa.Runtime.Health;
@@ -43,6 +44,10 @@ public static class ServiceCollectionExtensions
     {
         services.TryAddSingleton<IAlarmHistorianSink>(NullAlarmHistorianSink.Instance);
         services.TryAddSingleton<IHistorianDataSource>(NullHistorianDataSource.Instance);
+        // VirtualTag historization sink. Null default — the durable AVEVA sink is infra-gated (there is
+        // no live-data historian write RPC). TryAddSingleton so a deployment that bound a real
+        // IHistoryWriter earlier wins.
+        services.TryAddSingleton<IHistoryWriter>(NullHistoryWriter.Instance);
         services.TryAddSingleton<IDriverFactory>(NullDriverFactory.Instance);
         services.TryAddSingleton<IOpcUaAddressSpaceSink>(NullOpcUaAddressSpaceSink.Instance);
         services.TryAddSingleton<IServiceLevelPublisher>(NullServiceLevelPublisher.Instance);
@@ -184,6 +189,10 @@ public static class ServiceCollectionExtensions
                 virtualTagEvaluator = NullVirtualTagEvaluator.Instance;
             }
 
+            // VirtualTag historization sink threaded to the spawned VirtualTagHostActor. Null default
+            // (durable AVEVA sink is infra-gated); a deployment binding a real IHistoryWriter overrides.
+            var historyWriter = resolver.GetService<IHistoryWriter>() ?? NullHistoryWriter.Instance;
+
             var dbHealth = system.ActorOf(
                 DbHealthProbeActor.Props(dbFactory),
                 DbHealthProbeActorName);
@@ -215,6 +224,7 @@ public static class ServiceCollectionExtensions
                     opcUaPublishActor: publishActor,
                     healthPublisher: healthPublisher,
                     virtualTagEvaluator: virtualTagEvaluator,
+                    historyWriter: historyWriter,
                     loggerFactory: loggerFactory,
                     scriptRootLogger: scriptRootLogger),
                 DriverHostActorName);