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/Core/ZB.MOM.WW.OtOpcUa.Commons/Browsing/IBrowseSession.cs

@@ -16,14 +16,22 @@ public interface IBrowseSession : IAsyncDisposable
     DateTime LastUsedUtc { get; }
 
     /// <summary>Returns the top-level browse nodes.</summary>
+    /// <param name="cancellationToken">Cancellation token for the operation.</param>
+    /// <returns>The top-level browse nodes.</returns>
     Task<IReadOnlyList<BrowseNode>> RootAsync(CancellationToken cancellationToken);
 
     /// <summary>Returns the direct children of the node identified by
     /// <paramref name="nodeId"/>.</summary>
+    /// <param name="nodeId">The node whose direct children are returned.</param>
+    /// <param name="cancellationToken">Cancellation token for the operation.</param>
+    /// <returns>The direct children of the node.</returns>
     Task<IReadOnlyList<BrowseNode>> ExpandAsync(string nodeId, CancellationToken cancellationToken);
 
     /// <summary>Returns the attributes of the node identified by <paramref name="nodeId"/>.
     /// Empty for drivers whose tree is uniform (OPC UA Client). Galaxy uses this to populate
     /// the attribute side-panel after the user selects an object.</summary>
+    /// <param name="nodeId">The node whose attributes are returned.</param>
+    /// <param name="cancellationToken">Cancellation token for the operation.</param>
+    /// <returns>The attributes of the node.</returns>
     Task<IReadOnlyList<AttributeInfo>> AttributesAsync(string nodeId, CancellationToken cancellationToken);
 }

src/Core/ZB.MOM.WW.OtOpcUa.Commons/Browsing/IDriverBrowser.cs

@@ -15,5 +15,6 @@ public interface IDriverBrowser
     /// <param name="configJson">Driver options serialized as JSON; same shape the runtime
     /// driver would consume.</param>
     /// <param name="cancellationToken">Cancellation for the connect phase only.</param>
+    /// <returns>The opened browse session.</returns>
     Task<IBrowseSession> OpenAsync(string configJson, CancellationToken cancellationToken);
 }