feat(historian-gateway): read cutover — AddServerHistorian builds GatewayHistorianDataSource

Claude-Session: https://claude.ai/code/session_012SDSQ3AcaXqPcBtDESBRii

src/Server/ZB.MOM.WW.OtOpcUa.Host/Program.cs

@@ -22,6 +22,7 @@ using ZB.MOM.WW.OtOpcUa.Host.Health;
 using ZB.MOM.WW.OtOpcUa.Host.Logging;
 using ZB.MOM.WW.OtOpcUa.Host.Observability;
 using ZB.MOM.WW.OtOpcUa.Host.OpcUa;
+using ZB.MOM.WW.OtOpcUa.Driver.Historian.Gateway;
 using ZB.MOM.WW.OtOpcUa.Driver.Historian.Wonderware.Client;
 using ZB.MOM.WW.OtOpcUa.OpcUaServer;
 using ZB.MOM.WW.OtOpcUa.Runtime.Historian;
@@ -109,17 +110,12 @@ if (hasDriver)
 
     // Config-gated server-side HistoryRead backend. When the ServerHistorian section is enabled this
     // overrides the NullHistorianDataSource default from AddOtOpcUaRuntime (last registration wins) with
-    // a read-only WonderwareHistorianClient the node manager's HistoryRead overrides block-bridge to.
-    // The client is supplied here because the Host is the only project that references the Wonderware
-    // client — Runtime owns the gating, the Host supplies the concrete read downstream.
+    // a read-only HistorianGateway-backed data source the node manager's HistoryRead overrides
+    // block-bridge to. The factory lives in the Gateway driver (which owns the package-client adapter
+    // and the ServerHistorianOptions -> client-options mapping); Runtime owns the gating.
     builder.Services.AddServerHistorian(
         builder.Configuration,
-        (opts, sp) => new WonderwareHistorianClient(
-            new WonderwareHistorianClientOptions(opts.Host, opts.Port, opts.SharedSecret)
-            {
-                UseTls = opts.UseTls, ServerCertThumbprint = opts.ServerCertThumbprint,
-            },
-            sp.GetService<ILogger<WonderwareHistorianClient>>()));
+        (opts, sp) => GatewayHistorian.CreateDataSource(opts, sp));
 
     // Bind every cross-platform driver factory before AddAkka resolves IDriverFactory — replaces
     // the F7-default NullDriverFactory with a real DriverFactoryRegistryAdapter so DriverHostActor