feat(transport): export site/instance selection end-to-end via CLI + ManagementActor (M8 B4)

src/ZB.MOM.WW.ScadaBridge.Transport/Export/BundleExporter.cs

@@ -73,6 +73,10 @@ public sealed class BundleExporter : IBundleExporter
         var resolved = await _resolver.ResolveAsync(selection, cancellationToken).ConfigureAwait(false);
 
         // 2. Convert to the wire-shaped DTO (strips EF identity, refs-by-name).
+        //    M8 (B4): the resolver's site/dataConnection/instance closure is wired
+        //    through via object-initializer — without this the aggregate would
+        //    carry the empty defaults and the bundle would ship empty site/
+        //    instance arrays even when those were selected (review item I3).
         var aggregate = new EntityAggregate(
             TemplateFolders: resolved.TemplateFolders,
             Templates: resolved.Templates,
@@ -83,7 +87,12 @@ public sealed class BundleExporter : IBundleExporter
             NotificationLists: resolved.NotificationLists,
             SmtpConfigurations: resolved.SmtpConfigs,
             // Inbound API keys are not transported between environments (re-arch C4).
-            ApiMethods: resolved.ApiMethods);
+            ApiMethods: resolved.ApiMethods)
+        {
+            Sites = resolved.Sites,
+            DataConnections = resolved.DataConnections,
+            Instances = resolved.Instances,
+        };
         var contentDto = _entitySerializer.ToBundleContent(aggregate);
 
         // 3. Per-category summary counts — used for fast humanly-readable preview at import.