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.Cluster/RoleParser.cs

@@ -9,6 +9,7 @@ public static class RoleParser
 
     /// <summary>Parses a comma-separated string of role names into a validated array.</summary>
     /// <param name="raw">The raw role string to parse.</param>
+    /// <returns>The distinct, lower-cased, validated role names.</returns>
     public static string[] Parse(string? raw)
     {
         if (string.IsNullOrWhiteSpace(raw)) return Array.Empty<string>();