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.Configuration/Entities/ClusterNode.cs

@@ -20,7 +20,7 @@ public sealed class ClusterNode
 
     /// <summary>
     ///     OPC UA <c>ApplicationUri</c> — MUST be unique per node per OPC UA spec. Clients pin trust here.
-    ///     Fleet-wide unique index enforces no two nodes share a value (decision #86).
+    ///     Fleet-wide unique index enforces no two nodes share a value.
     ///     Stored explicitly, NOT derived from <see cref="Host"/> at runtime — silent rewrite on
     ///     hostname change would break all client trust.
     /// </summary>
@@ -31,7 +31,7 @@ public sealed class ClusterNode
 
     /// <summary>
     ///     Per-node override JSON keyed by DriverInstanceId, merged onto cluster-level DriverConfig
-    ///     at apply time. Minimal by intent (decision #81). Nullable when no overrides exist.
+    ///     at apply time. Minimal by intent. Nullable when no overrides exist.
     /// </summary>
     public string? DriverConfigOverridesJson { get; set; }