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/Server/ZB.MOM.WW.OtOpcUa.AdminUI/Browsing/BrowseSessionReaper.cs

@@ -38,6 +38,8 @@ public sealed class BrowseSessionReaper(
 
     /// <summary>Evicts every session whose <see cref="Commons.Browsing.IBrowseSession.LastUsedUtc"/>
     /// is older than <see cref="IdleTtl"/>. Internal so tests can drive a tick directly.</summary>
+    /// <param name="ct">Cancellation token for the reap pass.</param>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     internal async Task ReapOnceAsync(CancellationToken ct)
     {
         var now = DateTime.UtcNow;

src/Server/ZB.MOM.WW.OtOpcUa.AdminUI/Browsing/BrowseSessionRegistry.cs

@@ -14,17 +14,25 @@ public sealed class BrowseSessionRegistry
     private readonly ConcurrentDictionary<Guid, IBrowseSession> _sessions = new();
 
     /// <summary>Adds (or replaces) a session in the registry keyed by its token.</summary>
+    /// <param name="session">The session to register.</param>
     public void Register(IBrowseSession session) => _sessions[session.Token] = session;
 
     /// <summary>Looks up a session by token without removing it.</summary>
+    /// <param name="token">The token identifying the session to look up.</param>
+    /// <param name="session">The found session, if any.</param>
+    /// <returns><c>true</c> if a session with the given token was found.</returns>
     public bool TryGet(Guid token, out IBrowseSession session) =>
         _sessions.TryGetValue(token, out session!);
 
     /// <summary>Atomically removes a session from the registry, returning it for disposal.</summary>
+    /// <param name="token">The token identifying the session to remove.</param>
+    /// <param name="session">The removed session, if found.</param>
+    /// <returns><c>true</c> if a session with the given token was found and removed.</returns>
     public bool TryRemove(Guid token, out IBrowseSession session) =>
         _sessions.TryRemove(token, out session!);
 
     /// <summary>Returns a point-in-time snapshot of all currently registered sessions.</summary>
+    /// <returns>The registered sessions and their tokens at the time of the call.</returns>
     public IReadOnlyList<(Guid Token, IBrowseSession Session)> Snapshot() =>
         _sessions.Select(kv => (kv.Key, kv.Value)).ToList();
 }

src/Server/ZB.MOM.WW.OtOpcUa.AdminUI/Browsing/IBrowserSessionService.cs

@@ -21,21 +21,38 @@ public interface IBrowserSessionService
 {
     /// <summary>Opens a session against the named driver type using the given JSON config.
     /// Never throws — all errors are surfaced via <see cref="BrowseOpenResult"/>.</summary>
+    /// <param name="driverType">The driver type to open a browse session against.</param>
+    /// <param name="configJson">The driver configuration as JSON.</param>
+    /// <param name="ct">Cancellation token for the operation.</param>
+    /// <returns>The result of opening the session, including the registry token on success.</returns>
     Task<BrowseOpenResult> OpenAsync(string driverType, string configJson, CancellationToken ct);
 
     /// <summary>Returns the root nodes of an open session. Throws
     /// <see cref="BrowseSessionNotFoundException"/> if the token is unknown.</summary>
+    /// <param name="token">Registry handle for the open browse session.</param>
+    /// <param name="ct">Cancellation token for the operation.</param>
+    /// <returns>The top-level browse nodes.</returns>
     Task<IReadOnlyList<BrowseNode>> RootAsync(Guid token, CancellationToken ct);
 
     /// <summary>Returns the direct children of <paramref name="nodeId"/> in an open session.
     /// Throws <see cref="BrowseSessionNotFoundException"/> if the token is unknown.</summary>
+    /// <param name="token">Registry handle for the open browse session.</param>
+    /// <param name="nodeId">The node whose direct children are returned.</param>
+    /// <param name="ct">Cancellation token for the operation.</param>
+    /// <returns>The direct children of the node.</returns>
     Task<IReadOnlyList<BrowseNode>> ExpandAsync(Guid token, string nodeId, CancellationToken ct);
 
     /// <summary>Returns the attributes of <paramref name="nodeId"/> in an open session. Throws
     /// <see cref="BrowseSessionNotFoundException"/> if the token is unknown.</summary>
+    /// <param name="token">Registry handle for the open browse session.</param>
+    /// <param name="nodeId">The node whose attributes are returned.</param>
+    /// <param name="ct">Cancellation token for the operation.</param>
+    /// <returns>The attributes of the node.</returns>
     Task<IReadOnlyList<AttributeInfo>> AttributesAsync(Guid token, string nodeId, CancellationToken ct);
 
     /// <summary>Removes the session from the registry and disposes it. No-op for unknown tokens.</summary>
+    /// <param name="token">Registry handle for the browse session to close.</param>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     Task CloseAsync(Guid token);
 }