Expand XML docs across bridge and test code

tools/opcuacli-dotnet/Commands/ReadCommand.cs

@@ -9,12 +9,22 @@ namespace OpcUaCli.Commands;
 [Command("read", Description = "Read a value from a node")]
 public class ReadCommand : ICommand
 {
+    /// <summary>
+    /// Gets the OPC UA endpoint URL to connect to before reading.
+    /// </summary>
     [CommandOption("url", 'u', Description = "OPC UA server endpoint URL", IsRequired = true)]
     public string Url { get; init; } = default!;
 
+    /// <summary>
+    /// Gets the node identifier whose value should be read.
+    /// </summary>
     [CommandOption("node", 'n', Description = "Node ID (e.g. ns=2;s=MyNode)", IsRequired = true)]
     public string NodeId { get; init; } = default!;
 
+    /// <summary>
+    /// Connects to the endpoint, reads the target node, and prints the returned value details.
+    /// </summary>
+    /// <param name="console">The console used to report the read result.</param>
     public async ValueTask ExecuteAsync(IConsole console)
     {
         using var session = await OpcUaHelper.ConnectAsync(Url);