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.Galaxy/Runtime/EventPump.cs

@@ -61,8 +61,17 @@ internal sealed class EventPump : IAsyncDisposable
     private Task? _dispatchLoop;
     private bool _disposed;
 
+    /// <summary>Occurs when a data change event is received from the Galaxy subscriber.</summary>
     public event EventHandler<DataChangeEventArgs>? OnDataChange;
 
+    /// <summary>Initializes a new instance of the EventPump class.</summary>
+    /// <param name="subscriber">The Galaxy subscriber to consume events from.</param>
+    /// <param name="registry">The subscription registry for resolving subscribers.</param>
+    /// <param name="logger">The logger instance; if null, uses NullLogger.</param>
+    /// <param name="handleFactory">The factory for creating subscription handles; if null, uses GalaxySubscriptionHandle.</param>
+    /// <param name="channelCapacity">The bounded channel capacity for buffering events.</param>
+    /// <param name="clientName">The client name for metric tagging; if null, uses "&lt;unknown&gt;".</param>
+    /// <param name="onStreamFault">Optional callback invoked when the stream faults.</param>
     public EventPump(
         IGalaxySubscriber subscriber,
         SubscriptionRegistry registry,
@@ -234,6 +243,8 @@ internal sealed class EventPump : IAsyncDisposable
             ServerTimestampUtc: DateTime.UtcNow);
     }
 
+    /// <summary>Disposes the event pump and cancels all running tasks.</summary>
+    /// <returns>A value task representing the asynchronous disposal operation.</returns>
     public async ValueTask DisposeAsync()
     {
         if (_disposed) return;