The fixture resolves GameData/Mods through ShipModCatalog.ResolveCatalog once per test process and throws on any
excluded package, so a broken first-party package fails the suite. With no GameData/Mods it is the shipped catalog,
unchanged. Builds and tests not yet run on this commit.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>