Expand XML docs across bridge and test code

tests/ZB.MOM.WW.LmxOpcUa.Tests/OpcUa/LmxNodeManagerRebuildTests.cs

@@ -6,8 +6,14 @@ using ZB.MOM.WW.LmxOpcUa.Host.OpcUa;
 
 namespace ZB.MOM.WW.LmxOpcUa.Tests.OpcUa
 {
+    /// <summary>
+    /// Verifies rebuild behavior by comparing address-space models before and after metadata changes.
+    /// </summary>
     public class LmxNodeManagerRebuildTests
     {
+        /// <summary>
+        /// Confirms that rebuilding with new metadata replaces the old tag-reference set.
+        /// </summary>
         [Fact]
         public void Rebuild_NewBuild_ReplacesOldData()
         {
@@ -40,6 +46,9 @@ namespace ZB.MOM.WW.LmxOpcUa.Tests.OpcUa
             model2.NodeIdToTagReference.ContainsKey("NewObj.NewAttr").ShouldBe(true);
         }
 
+        /// <summary>
+        /// Confirms that object counts are recalculated from the latest rebuild input.
+        /// </summary>
         [Fact]
         public void Rebuild_UpdatesNodeCounts()
         {
@@ -59,6 +68,9 @@ namespace ZB.MOM.WW.LmxOpcUa.Tests.OpcUa
             model2.ObjectCount.ShouldBe(1);
         }
 
+        /// <summary>
+        /// Confirms that empty metadata produces an empty address-space model.
+        /// </summary>
         [Fact]
         public void EmptyHierarchy_ProducesEmptyModel()
         {