Expand XML docs across bridge and test code

src/ZB.MOM.WW.LmxOpcUa.Host/OpcUa/OpcUaServerHost.cs

@@ -23,10 +23,27 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
         private ApplicationInstance? _application;
         private LmxOpcUaServer? _server;
 
+        /// <summary>
+        /// Gets the active node manager that holds the published Galaxy namespace.
+        /// </summary>
         public LmxNodeManager? NodeManager => _server?.NodeManager;
+
+        /// <summary>
+        /// Gets the number of currently connected OPC UA client sessions.
+        /// </summary>
         public int ActiveSessionCount => _server?.ActiveSessionCount ?? 0;
+
+        /// <summary>
+        /// Gets a value indicating whether the OPC UA server has been started and not yet stopped.
+        /// </summary>
         public bool IsRunning => _server != null;
 
+        /// <summary>
+        /// Initializes a new host for the Galaxy-backed OPC UA server instance.
+        /// </summary>
+        /// <param name="config">The endpoint and session settings for the OPC UA host.</param>
+        /// <param name="mxAccessClient">The runtime client used by the node manager for live reads, writes, and subscriptions.</param>
+        /// <param name="metrics">The metrics collector shared with the node manager and runtime bridge.</param>
         public OpcUaServerHost(OpcUaConfiguration config, IMxAccessClient mxAccessClient, PerformanceMetrics metrics)
         {
             _config = config;
@@ -34,6 +51,9 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
             _metrics = metrics;
         }
 
+        /// <summary>
+        /// Starts the OPC UA application instance, prepares certificates, and binds the Galaxy namespace to the configured endpoint.
+        /// </summary>
         public async Task StartAsync()
         {
             var namespaceUri = $"urn:{_config.GalaxyName}:LmxOpcUa";
@@ -142,6 +162,9 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
                 _config.Port, _config.EndpointPath, namespaceUri);
         }
 
+        /// <summary>
+        /// Stops the OPC UA application instance and releases its in-memory server objects.
+        /// </summary>
         public void Stop()
         {
             try
@@ -160,6 +183,9 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
             }
         }
 
+        /// <summary>
+        /// Stops the host and releases server resources.
+        /// </summary>
         public void Dispose() => Stop();
     }
 }