Added Vite build output directories to .gitignore and configured Vite to output to ../wwwroot. Removed obsolete App.spec.ts test file from GUI/src/__tests__.
Changed AltersGruppe model ID from int to string and now generates ULID automatically. Added AltersGruppeConfiguration for EF Core mapping. Updated ApplicationDbContext to apply configurations from assembly. Removed obsolete migration files and database artifacts. Added Ulid package dependency.