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.Core.Abstractions/IAddressSpaceBuilder.cs

@@ -6,9 +6,9 @@ namespace ZB.MOM.WW.OtOpcUa.Core.Abstractions;
 ///     as it discovers nodes — no buffering of the whole tree.
 /// </summary>
 /// <remarks>
-///     Per <c>docs/v2/plan.md</c> decision #52 — drivers register nodes via this builder
-///     rather than returning a tree object. Supports incremental / large address spaces
-///     without forcing the driver to buffer the whole tree.
+///     Drivers register nodes via this builder rather than returning a tree object,
+///     supporting incremental / large address spaces without forcing the driver to
+///     buffer the whole tree.
 /// </remarks>
 public interface IAddressSpaceBuilder
 {
@@ -18,6 +18,7 @@ public interface IAddressSpaceBuilder
     /// </summary>
     /// <param name="browseName">OPC UA browse name (the segment of the path under the parent).</param>
     /// <param name="displayName">Human-readable display name. May equal <paramref name="browseName"/>.</param>
+    /// <returns>A child builder scoped to inside the new folder.</returns>
     IAddressSpaceBuilder Folder(string browseName, string displayName);
 
     /// <summary>
@@ -27,6 +28,7 @@ public interface IAddressSpaceBuilder
     /// <param name="browseName">OPC UA browse name (the segment of the path under the parent folder).</param>
     /// <param name="displayName">Human-readable display name. May equal <paramref name="browseName"/>.</param>
     /// <param name="attributeInfo">Driver-side metadata for the variable.</param>
+    /// <returns>A handle for the registered variable, used by Core for subscription routing.</returns>
     IVariableHandle Variable(string browseName, string displayName, DriverAttributeInfo attributeInfo);
 
     /// <summary>
@@ -56,6 +58,7 @@ public interface IVariableHandle
     ///     <c>Acknowledge</c>, <c>Deactivate</c>).
     /// </summary>
     /// <param name="info">The alarm condition information.</param>
+    /// <returns>The sink that receives lifecycle transitions for this alarm condition.</returns>
     IAlarmConditionSink MarkAsAlarmCondition(AlarmConditionInfo info);
 }