docs(xml): fill missing XML doc comments + strip task-tracking refs across src (fixdocs)

Add missing <summary>/<param>/<returns>/<typeparam> tags and switch
interface implementations to <inheritdoc/> across 106 files; strip
project bookkeeping identifiers (Task NN, #05-TNN, PLAN-04, StoreAndForward-0NN)
from shipped code comments while preserving the descriptive rationale.
Comment-only: zero code-logic lines changed; solution builds 0/0.

Claude-Session: https://claude.ai/code/session_01MtdgwpEeCUn6cUA5f1LMPj

src/ZB.MOM.WW.ScadaBridge.TemplateEngine/Flattening/FlatteningService.cs

@@ -909,8 +909,8 @@ public class FlatteningService
     /// Recursively resolves the scripts of a composed module and every module
     /// nested inside it, path-qualifying each canonical name with the
     /// accumulated <paramref name="prefix"/>. <paramref name="parentPath"/> is
-    /// the path of the enclosing module — empty for a depth-1 composition
-    /// (parent is the root template) and the enclosing module's
+    /// the path of the enclosing module — empty for a top-level composition
+    /// (nesting depth 1; parent is the root template) and the enclosing module's
     /// <c>prefix</c> for deeper nesting — and is carried into each script's
     /// <see cref="ScriptScope"/> so a nested script's <c>Parent.X</c>
     /// resolves against its real parent module.

src/ZB.MOM.WW.ScadaBridge.TemplateEngine/Flattening/RevisionHashService.cs

@@ -19,7 +19,7 @@ namespace ZB.MOM.WW.ScadaBridge.TemplateEngine.Flattening;
 /// Collections are explicitly sorted by <c>CanonicalName</c> before hashing.
 /// </para>
 /// <para>
-/// MIGRATION (TemplateEngine-011): native alarm source bindings
+/// Native alarm source bindings
 /// (<see cref="ResolvedNativeAlarmSource"/>) now participate in the hash so
 /// that binding edits flag the instance stale. The hashable property is
 /// populated NULL-WHEN-EMPTY and the serializer omits null properties