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/Client/ZB.MOM.WW.OtOpcUa.Client.Shared.Tests/Fakes/FakeSessionAdapter.cs

@@ -20,31 +20,53 @@ internal sealed class FakeSessionAdapter : ISessionAdapter
     /// Gets a value indicating whether the fake session has been disposed.
     /// </summary>
     public bool Disposed { get; private set; }
+    /// <summary>Gets the number of times ReadValueAsync has been called.</summary>
     public int ReadCount { get; private set; }
+    /// <summary>Gets the number of times WriteValueAsync has been called.</summary>
     public int WriteCount { get; private set; }
+    /// <summary>Gets the number of times BrowseAsync has been called.</summary>
     public int BrowseCount { get; private set; }
+    /// <summary>Gets the number of times BrowseNextAsync has been called.</summary>
     public int BrowseNextCount { get; private set; }
+    /// <summary>Gets the number of times HasChildrenAsync has been called.</summary>
     public int HasChildrenCount { get; private set; }
+    /// <summary>Gets the number of times HistoryReadRawAsync has been called.</summary>
     public int HistoryReadRawCount { get; private set; }
+    /// <summary>Gets the number of times HistoryReadAggregateAsync has been called.</summary>
     public int HistoryReadAggregateCount { get; private set; }
 
     // Configurable responses
+    /// <summary>Gets or sets the data value returned by read operations.</summary>
     public DataValue? ReadResponse { get; set; }
+    /// <summary>Gets or sets a function to generate read responses dynamically based on the node ID.</summary>
     public Func<NodeId, DataValue>? ReadResponseFunc { get; set; }
+    /// <summary>Gets or sets the status code returned by write operations.</summary>
     public StatusCode WriteResponse { get; set; } = StatusCodes.Good;
+    /// <summary>Gets or sets a value indicating whether read operations should throw an exception.</summary>
     public bool ThrowOnRead { get; set; }
+    /// <summary>Gets or sets a value indicating whether write operations should throw an exception.</summary>
     public bool ThrowOnWrite { get; set; }
+    /// <summary>Gets or sets a value indicating whether browse operations should throw an exception.</summary>
     public bool ThrowOnBrowse { get; set; }
 
+    /// <summary>Gets or sets the browse references returned by browse operations.</summary>
     public ReferenceDescriptionCollection BrowseResponse { get; set; } = [];
+    /// <summary>Gets or sets the continuation point for browse operations.</summary>
     public byte[]? BrowseContinuationPoint { get; set; }
+    /// <summary>Gets or sets the browse references returned by browse-next operations.</summary>
     public ReferenceDescriptionCollection BrowseNextResponse { get; set; } = [];
+    /// <summary>Gets or sets the continuation point for browse-next operations.</summary>
     public byte[]? BrowseNextContinuationPoint { get; set; }
+    /// <summary>Gets or sets the result returned by has-children operations.</summary>
     public bool HasChildrenResponse { get; set; } = false;
 
+    /// <summary>Gets or sets the historical values returned by raw history-read operations.</summary>
     public List<DataValue> HistoryReadRawResponse { get; set; } = [];
+    /// <summary>Gets or sets the historical values returned by aggregate history-read operations.</summary>
     public List<DataValue> HistoryReadAggregateResponse { get; set; } = [];
+    /// <summary>Gets or sets a value indicating whether raw history-read operations should throw an exception.</summary>
     public bool ThrowOnHistoryReadRaw { get; set; }
+    /// <summary>Gets or sets a value indicating whether aggregate history-read operations should throw an exception.</summary>
     public bool ThrowOnHistoryReadAggregate { get; set; }
 
     /// <summary>
@@ -210,6 +232,7 @@ internal sealed class FakeSessionAdapter : ISessionAdapter
     /// <summary>
     ///     Simulates a keep-alive event.
     /// </summary>
+    /// <param name="isGood">Whether the keep-alive status is good.</param>
     public void SimulateKeepAlive(bool isGood)
     {
         _keepAliveCallback?.Invoke(isGood);