docs(xmldoc): fill missing XML docs + strip tracking-ID comments across src

Adds <summary>/<param>/<returns>/<inheritdoc> where missing and removes
project bookkeeping IDs (task/tracking refs) from shipped code comments,
so the docs read cleanly and CommentChecker is quiet except for known
false positives (PLC/protocol terms, event/IEqualityComparer inheritdoc).
Doc/comment-only; no logic changed; solution builds clean.

src/Drivers/ZB.MOM.WW.OtOpcUa.Driver.Galaxy/Runtime/GatewayGalaxyAlarmFeed.cs

@@ -39,6 +39,7 @@ internal sealed class GatewayGalaxyAlarmFeed : IGalaxyAlarmFeed
     /// </summary>
     /// <param name="request">The stream request parameters.</param>
     /// <param name="cancellationToken">A cancellation token.</param>
+    /// <returns>The async stream of decoded alarm-feed messages.</returns>
     internal delegate IAsyncEnumerable<AlarmFeedMessage> AlarmStreamFactory(
         StreamAlarmsRequest request, CancellationToken cancellationToken);
 
@@ -90,7 +91,7 @@ internal sealed class GatewayGalaxyAlarmFeed : IGalaxyAlarmFeed
         _clientTag = new KeyValuePair<string, object?>("galaxy.client", clientName ?? "<unknown>");
     }
 
-    /// <summary>Starts the alarm feed by opening the stream and processing messages in a background task.</summary>
+    /// <inheritdoc />
     public void Start()
     {
         ObjectDisposedException.ThrowIf(_disposed, this);
@@ -261,6 +262,7 @@ internal sealed class GatewayGalaxyAlarmFeed : IGalaxyAlarmFeed
     };
 
     /// <summary>Releases the alarm feed resources and stops the background stream task.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     public async ValueTask DisposeAsync()
     {
         if (_disposed) return;