Add centralized stop grace period resolution for application settings and use it across manual stops, preview stops, and deployments. Validate the Livewire advanced setting against shared min/max constants and cover persistence, fillable creation, and fallback behavior with tests.
Add feature tests covering railpack build pack via REST API and
Livewire UI components, plus a bash smoke test that deploys seeded
railpack-* example apps against the local dev stack and verifies
COOLIFY_*, SOURCE_COMMIT, and RAILPACK_* env vars land correctly.
