Takes master's catalog pointer (GameData/Aetheria.cc) and its TestCatalog.Registry fixture path;
VerseGrammar is the global scratch catalogs author (TestCatalogGlobal stays deleted: the shipped
registry now has a real global, so a test-only second one would have to be authored beside it).
StatResolverTests, TestCatalogTests and AetheriaStoresTests author VerseGrammar.
Does not pass the suite: the catalog is master's and holds no grammar until the verse-grammar apply commit follows.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>