docs: backfill XML documentation across 756 files

Adds <summary>, <param>, <typeparam>, and <inheritdoc/> tags to public
members surfaced by commentchecker — resolves 5,847 of 5,869 issues
(99.6%) across three /fixdocs passes.

tests/Drivers/ZB.MOM.WW.OtOpcUa.Driver.Historian.Wonderware.Client.Tests/FakeSidecarServer.cs

@@ -16,10 +16,19 @@ internal sealed class FakeSidecarServer : IAsyncDisposable
     private readonly CancellationTokenSource _cts = new();
     private Task? _loop;
 
+    /// <summary>Gets or sets the handler for ReadRaw requests.</summary>
     public Func<ReadRawRequest, ReadRawReply> OnReadRaw { get; set; } = _ => new ReadRawReply { Success = true };
+
+    /// <summary>Gets or sets the handler for ReadProcessed requests.</summary>
     public Func<ReadProcessedRequest, ReadProcessedReply> OnReadProcessed { get; set; } = _ => new ReadProcessedReply { Success = true };
+
+    /// <summary>Gets or sets the handler for ReadAtTime requests.</summary>
     public Func<ReadAtTimeRequest, ReadAtTimeReply> OnReadAtTime { get; set; } = _ => new ReadAtTimeReply { Success = true };
+
+    /// <summary>Gets or sets the handler for ReadEvents requests.</summary>
     public Func<ReadEventsRequest, ReadEventsReply> OnReadEvents { get; set; } = _ => new ReadEventsReply { Success = true };
+
+    /// <summary>Gets or sets the handler for WriteAlarmEvents requests.</summary>
     public Func<WriteAlarmEventsRequest, WriteAlarmEventsReply> OnWriteAlarmEvents { get; set; } = req
         => new WriteAlarmEventsReply { Success = true, PerEventOk = Enumerable.Repeat(true, req.Events.Length).ToArray() };
 
@@ -46,14 +55,19 @@ internal sealed class FakeSidecarServer : IAsyncDisposable
     /// </summary>
     public bool StallAfterRequest { get; set; }
 
+    /// <summary>Initializes a new instance of FakeSidecarServer with the specified pipe name and expected secret.</summary>
+    /// <param name="pipeName">The name of the named pipe to use for communication.</param>
+    /// <param name="expectedSecret">The expected shared secret for handshake validation.</param>
     public FakeSidecarServer(string pipeName, string expectedSecret)
     {
         _pipeName = pipeName;
         _expectedSecret = expectedSecret;
     }
 
+    /// <summary>Gets the named pipe name used for communication.</summary>
     public string PipeName => _pipeName;
 
+    /// <summary>Starts the fake sidecar server asynchronously.</summary>
     public Task StartAsync()
     {
         _loop = Task.Run(() => RunAsync(_cts.Token));
@@ -179,6 +193,7 @@ internal sealed class FakeSidecarServer : IAsyncDisposable
         }
     }
 
+    /// <summary>Releases all resources used by the fake sidecar server.</summary>
     public async ValueTask DisposeAsync()
     {
         _cts.Cancel();