Expand XML docs across bridge and test code

tests/ZB.MOM.WW.LmxOpcUa.Tests/Helpers/OpcUaServerFixtureTests.cs

@@ -6,8 +6,14 @@ using ZB.MOM.WW.LmxOpcUa.Host.Domain;
 
 namespace ZB.MOM.WW.LmxOpcUa.Tests.Helpers
 {
+    /// <summary>
+    /// Verifies the reusable OPC UA server fixture used by integration and wiring tests.
+    /// </summary>
     public class OpcUaServerFixtureTests
     {
+        /// <summary>
+        /// Confirms that the standard fake-backed fixture starts the bridge and tears it down cleanly.
+        /// </summary>
         [Fact]
         public async Task WithFakes_StartsAndStops()
         {
@@ -25,6 +31,9 @@ namespace ZB.MOM.WW.LmxOpcUa.Tests.Helpers
             await fixture.DisposeAsync();
         }
 
+        /// <summary>
+        /// Confirms that the fake-client fixture bypasses COM wiring and uses the provided fake runtime client.
+        /// </summary>
         [Fact]
         public async Task WithFakeMxAccessClient_SkipsCom()
         {
@@ -38,6 +47,9 @@ namespace ZB.MOM.WW.LmxOpcUa.Tests.Helpers
             await fixture.DisposeAsync();
         }
 
+        /// <summary>
+        /// Confirms that separate fixture instances automatically allocate unique OPC UA ports.
+        /// </summary>
         [Fact]
         public async Task MultipleFixtures_GetUniquePortsAutomatically()
         {
@@ -57,6 +69,9 @@ namespace ZB.MOM.WW.LmxOpcUa.Tests.Helpers
             await fixture2.DisposeAsync();
         }
 
+        /// <summary>
+        /// Confirms that fixture shutdown completes quickly enough for the integration test suite.
+        /// </summary>
         [Fact]
         public async Task Shutdown_CompletesWithin30Seconds()
         {
@@ -70,6 +85,9 @@ namespace ZB.MOM.WW.LmxOpcUa.Tests.Helpers
             sw.Elapsed.TotalSeconds.ShouldBeLessThan(30);
         }
 
+        /// <summary>
+        /// Confirms that the fake-backed fixture builds the seeded address space and Galaxy statistics.
+        /// </summary>
         [Fact]
         public async Task WithFakes_BuildsAddressSpace()
         {