feat(historian): AddServerHistorian DI + Host wiring of IHistorianDataSource

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

@@ -42,6 +42,7 @@ public static class ServiceCollectionExtensions
     public static IServiceCollection AddOtOpcUaRuntime(this IServiceCollection services)
     {
         services.TryAddSingleton<IAlarmHistorianSink>(NullAlarmHistorianSink.Instance);
+        services.TryAddSingleton<IHistorianDataSource>(NullHistorianDataSource.Instance);
         services.TryAddSingleton<IDriverFactory>(NullDriverFactory.Instance);
         services.TryAddSingleton<IOpcUaAddressSpaceSink>(NullOpcUaAddressSpaceSink.Instance);
         services.TryAddSingleton<IServiceLevelPublisher>(NullServiceLevelPublisher.Instance);
@@ -93,6 +94,38 @@ public static class ServiceCollectionExtensions
         return services;
     }
 
+    /// <summary>
+    ///     Config-gated server-side HistoryRead backend. When the <c>ServerHistorian</c> section has
+    ///     <c>Enabled=true</c>, registers the <paramref name="dataSourceFactory"/>-supplied
+    ///     <see cref="IHistorianDataSource"/> (the read-only Wonderware client) overriding the
+    ///     <see cref="NullHistorianDataSource"/> default from <see cref="AddOtOpcUaRuntime"/>. Otherwise
+    ///     a no-op (the Null default stays and the node manager's HistoryRead returns
+    ///     <c>GoodNoData</c>-empty). The data source is injected so the Wonderware client can be supplied
+    ///     by the Host, which is the only project that references it.
+    /// </summary>
+    /// <param name="services">The service collection to register with.</param>
+    /// <param name="configuration">The configuration carrying the <c>ServerHistorian</c> section.</param>
+    /// <param name="dataSourceFactory">
+    ///     Factory the Host supplies to build the concrete read <see cref="IHistorianDataSource"/>
+    ///     (the Wonderware client) from the bound options + the resolving provider.
+    /// </param>
+    /// <returns>The same <paramref name="services"/> instance for chaining.</returns>
+    public static IServiceCollection AddServerHistorian(
+        this IServiceCollection services,
+        IConfiguration configuration,
+        Func<ServerHistorianOptions, IServiceProvider, IHistorianDataSource> dataSourceFactory)
+    {
+        var opts = configuration.GetSection(ServerHistorianOptions.SectionName).Get<ServerHistorianOptions>();
+        if (opts is not { Enabled: true }) return services; // leave the Null default from AddOtOpcUaRuntime
+
+        foreach (var warning in opts.Validate())
+            Serilog.Log.Logger.ForContext<ServerHistorianOptions>().Warning("ServerHistorian config: {ServerHistorianConfigWarning}", warning);
+
+        // Last-registration-wins over the TryAddSingleton Null default seeded by AddOtOpcUaRuntime.
+        services.AddSingleton<IHistorianDataSource>(sp => dataSourceFactory(opts, sp));
+        return services;
+    }
+
     /// <summary>
     /// Spawns the per-node driver-role actors on the host's <see cref="ActorSystem"/>:
     /// <see cref="DriverHostActor"/> (one per node), <see cref="DbHealthProbeActor"/>