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/Health/PerPlatformProbeWatcher.cs

@@ -77,6 +77,7 @@ public sealed class PerPlatformProbeWatcher : IDisposable
     /// </summary>
     /// <param name="platformTagNames">The platform tag names to synchronize.</param>
     /// <param name="cancellationToken">A cancellation token to cancel the operation.</param>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     public async Task SyncPlatformsAsync(
         IEnumerable<string> platformTagNames, CancellationToken cancellationToken)
     {