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.Scripting.Abstractions/ScriptContext.cs

@@ -6,8 +6,8 @@ namespace ZB.MOM.WW.OtOpcUa.Core.Scripting;
 /// <summary>
 ///     The API user scripts see as the global <c>ctx</c>. Abstract — concrete subclasses
 ///     (e.g. <c>VirtualTagScriptContext</c>, <c>AlarmScriptContext</c>) plug in the
-///     actual tag-backend + logger + virtual-tag writer for each evaluation. Plan decision
-///     #6 (see <c>docs/v2/plan.md</c>): scripts can read any tag, write only to virtual
+///     actual tag-backend + logger + virtual-tag writer for each evaluation. By design
+///     (see <c>docs/v2/plan.md</c>), scripts can read any tag, write only to virtual
 ///     tags, and have no other .NET reach — no HttpClient, no File, no Process, no
 ///     reflection.
 /// </summary>
@@ -47,12 +47,13 @@ public abstract class ScriptContext
     ///     </para>
     /// </remarks>
     /// <param name="path">The literal tag path to read.</param>
+    /// <returns>A snapshot of the tag's current value, quality, and source timestamp.</returns>
     public abstract DataValueSnapshot GetTag(string path);
 
     /// <summary>
     ///     Write a value to a virtual tag. Operator scripts cannot write to driver-sourced
     ///     tags — the OPC UA dispatch in <c>DriverNodeManager</c> rejects that separately
-    ///     per ADR-002 with <c>BadUserAccessDenied</c>. This method is the only write path
+    ///     with <c>BadUserAccessDenied</c>. This method is the only write path
     ///     virtual tags have.
     /// </summary>
     /// <remarks>
@@ -89,6 +90,8 @@ public abstract class ScriptContext
     /// <param name="previous">The previous value to compare against.</param>
     /// <param name="tolerance">The minimum change magnitude to detect (must be &gt;= 0).
     ///     Negative values cause the function to always return true; NaN always returns false.</param>
+    /// <returns><c>true</c> when <paramref name="current"/> differs from <paramref name="previous"/>
+    ///     by more than <paramref name="tolerance"/>; otherwise <c>false</c>.</returns>
     public static bool Deadband(double current, double previous, double tolerance)
         => Math.Abs(current - previous) > tolerance;
 }