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.

src/Drivers/ZB.MOM.WW.OtOpcUa.Driver.Historian.Wonderware.Client/Internal/PipeChannel.cs

@@ -44,6 +44,10 @@ internal sealed class PipeChannel : IAsyncDisposable
             return pipe;
         };
 
+    /// <summary>Initializes a new instance of the <see cref="PipeChannel"/> class.</summary>
+    /// <param name="options">Configuration options for the historian client.</param>
+    /// <param name="connect">Function to establish a connection stream.</param>
+    /// <param name="logger">Logger instance for diagnostics.</param>
     public PipeChannel(
         WonderwareHistorianClientOptions options,
         Func<CancellationToken, Task<Stream>> connect,
@@ -54,12 +58,15 @@ internal sealed class PipeChannel : IAsyncDisposable
         _logger = logger ?? throw new ArgumentNullException(nameof(logger));
     }
 
+    /// <summary>Gets a value indicating whether the channel is currently connected.</summary>
     public bool IsConnected => _stream is not null;
 
     /// <summary>
     ///     Connects + performs the Hello handshake. Returns when the sidecar has accepted the
     ///     hello. Throws on rejection (bad secret, version mismatch, or transport failure).
     /// </summary>
+    /// <param name="ct">Cancellation token to stop the operation.</param>
+    /// <returns>A task representing the asynchronous connection operation.</returns>
     public async Task ConnectAsync(CancellationToken ct)
     {
         ObjectDisposedException.ThrowIf(_disposed, this);
@@ -75,6 +82,13 @@ internal sealed class PipeChannel : IAsyncDisposable
     ///     Sends one request, waits for the matching reply. On transport failure, reconnects
     ///     once and retries — broader retry policy lives in the calling layer.
     /// </summary>
+    /// <typeparam name="TRequest">The type of the request payload.</typeparam>
+    /// <typeparam name="TReply">The type of the reply payload.</typeparam>
+    /// <param name="requestKind">The message kind of the request.</param>
+    /// <param name="expectedReplyKind">The expected message kind of the reply.</param>
+    /// <param name="request">The request payload to send.</param>
+    /// <param name="cancellationToken">Cancellation token to stop the operation.</param>
+    /// <returns>A task that returns the reply payload.</returns>
     public async Task<TReply> InvokeAsync<TRequest, TReply>(
         MessageKind requestKind,
         MessageKind expectedReplyKind,
@@ -169,6 +183,8 @@ internal sealed class PipeChannel : IAsyncDisposable
         _stream = null;
     }
 
+    /// <summary>Releases all resources associated with this channel.</summary>
+    /// <returns>A task representing the asynchronous disposal operation.</returns>
     public ValueTask DisposeAsync()
     {
         if (_disposed) return ValueTask.CompletedTask;

src/Drivers/ZB.MOM.WW.OtOpcUa.Driver.Historian.Wonderware.Client/Internal/QualityMapper.cs

@@ -8,6 +8,9 @@ namespace ZB.MOM.WW.OtOpcUa.Driver.Historian.Wonderware.Client.Internal;
 /// </summary>
 internal static class QualityMapper
 {
+    /// <summary>Maps an OPC DA quality byte to an OPC UA StatusCode.</summary>
+    /// <param name="q">The OPC DA quality byte value.</param>
+    /// <returns>An OPC UA StatusCode as a uint.</returns>
     public static uint Map(byte q) => q switch
     {
         // Good family (192+)