docs: fill missing XML docs and strip tracking IDs from src comments

Clears CommentChecker findings in src/ (3,280 -> 209, the remainder being false
positives like PLC-5/IEEE-754/M0.0) by adding missing summaries/params/returns,
normalising inheritdoc usage, and removing Gitea/review tracking IDs while keeping
the rationale they annotated. Comment-only: comment-stripped sources are identical
to the parent commit.

src/Core/ZB.MOM.WW.OtOpcUa.Core.Scripting/ScriptSandbox.cs

@@ -81,7 +81,7 @@ public static class ScriptSandbox
         // surface (operator-authored hosting helpers, third-party packages, app code)
         // is not on the list and stays unreachable.
         var references = new List<MetadataReference>();
-        // #603: both halves are cached. CreateFromFile reads + maps the DLL, and the BCL half is ~170
+        // both halves are cached. CreateFromFile reads + maps the DLL, and the BCL half is ~170
         // assemblies, so doing it per compile was the dominant fixed cost of every ScriptEvaluator build.
         // MetadataReference is immutable and thread-safe, so sharing instances across compilations is safe.
         foreach (var asm in pinnedAssemblies)