fix(ui): schema-library delete-audit name + busy guard + edit-row guard + sanitized create-race test (#260)

src/ZB.MOM.WW.ScadaBridge.CentralUI/Services/SchemaLibraryQueryService.cs

@@ -31,8 +31,11 @@ public sealed class SchemaLibraryQueryService : ISchemaLibraryQueryService
         var repo = scope.ServiceProvider.GetRequiredService<ISharedSchemaRepository>();
         var all = await repo.ListAsync(cancellationToken);
 
-        // Ordinal-keyed to match the lib:Name resolver's exact-name lookup. Last-wins on
-        // the (DB-unique) name guards against a transient duplicate read.
+        // Ordinal-keyed to match the lib:Name resolver's exact-name lookup. Name is
+        // DB-unique, so a list yields at most one row per name and no real collision
+        // occurs; the indexer assignment is defensive only — should two rows ever share
+        // a name (e.g. a mid-write transient read), the later one in enumeration order
+        // overwrites the earlier rather than throwing.
         var map = new Dictionary<string, string>(StringComparer.Ordinal);
         foreach (var schema in all)
         {