fix(transport): template diffs resolve folder/base/composition names — unchanged structured templates classify Identical again

#05-T23. ArtifactDiff.CompareTemplate gains optional folderNameById /
templateNameById maps; FolderNameOf / BaseTemplateNameOf / CompositionTargetNameOf
resolve the existing template's FolderId / ParentTemplateId / composition
ComposedTemplateId to real names (falling back to the <id:N> placeholder only
when a map is absent or misses, keeping existing unit-test callers valid).
PreviewAsync builds templateNameById from GetAllTemplatesAsync (parent/composition
targets can be any template, not just bundle-named ones) and threads both maps
through. Fixes spurious Modified on every re-import of a foldered/derived/composed
template. End-to-end preview test + two ArtifactDiff unit tests.

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

src/ZB.MOM.WW.ScadaBridge.Transport/Import/BundleImporter.cs

@@ -392,10 +392,17 @@ public sealed class BundleImporter : IBundleImporter
             .ConfigureAwait(false);
         var hydratedByName = hydratedTemplates
             .ToDictionary(t => t.Name, t => t, StringComparer.Ordinal);
+        // #05-T23: a template's ParentTemplateId (base) and each composition's
+        // ComposedTemplateId point at ANY template in the DB (not just the ones
+        // whose names the bundle carries), so resolve names through the full
+        // template set. Without this map the diff compares "<id:N>" placeholders
+        // against real bundle names and reports spurious Modified.
+        var allTemplateStubs = await _templateRepo.GetAllTemplatesAsync(ct).ConfigureAwait(false);
+        var templateNameById = allTemplateStubs.ToDictionary(t => t.Id, t => t.Name);
         foreach (var tDto in content.Templates)
         {
             hydratedByName.TryGetValue(tDto.Name, out var existing);
-            items.Add(_diff.CompareTemplate(tDto, existing));
+            items.Add(_diff.CompareTemplate(tDto, existing, folderNameById, templateNameById));
         }
 
         // ---- SharedScripts ----