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.ControlPlane/Audit/AuditWriterActor.cs

@@ -39,6 +39,7 @@ public sealed class AuditWriterActor : ReceiveActor, IWithTimers, IAuditWriter
 
     /// <summary>Creates a Props factory for the AuditWriterActor.</summary>
     /// <param name="dbFactory">The database context factory for creating ConfigDb connections.</param>
+    /// <returns>The <see cref="Akka.Actor.Props"/> used to create an <see cref="AuditWriterActor"/>.</returns>
     public static Props Props(IDbContextFactory<OtOpcUaConfigDbContext> dbFactory) =>
         Akka.Actor.Props.Create(() => new AuditWriterActor(dbFactory));