merge(r2): r2-plan08

# Conflicts:
#	src/ZB.MOM.WW.ScadaBridge.Communication/CommunicationOptionsValidator.cs

src/ZB.MOM.WW.ScadaBridge.Transport/Serialization/EntitySerializer.cs

@@ -550,8 +550,14 @@ public sealed class EntitySerializer
             })
             .ToList();
 
-        // Instances: resolve template + site by name/identifier. Areas don't travel
-        // (see export TODO), so AreaId stays null. Connection bindings keep their
+        // Instances: resolve template + site by name/identifier. Areas DO travel —
+        // by NAME on InstanceDto.AreaName (export resolves AreaId→AreaNameById; the
+        // importer resolves-or-creates the area under the target site). This helper
+        // still materializes AreaId = null for the same reason the connection-binding
+        // FK below is a placeholder: FromBundleContent is NOT on the importer's path
+        // (BundleImporter walks the raw DTO) and has no target-DB name→id map to
+        // resolve against. Round-trip fidelity for the area lives on the DTO, not on
+        // this materialized entity. Connection bindings keep their
         // resolved DataConnection NAME on the wire DTO — the importer reads
         // bindings from BundleContentDto.Instances[].ConnectionBindings directly and
         // resolves ConnectionName→the target environment's DataConnectionId at apply