Also updates test_migrate_from_empty_applies_0001 → test_migrate_from_empty_applies_all
to assert both migrations apply on a fresh DB (mechanical consequence of adding 0002).
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Four-layer package (main > domains > platform) per SD-0001 §6.2; GraphQL api layer
deferred. main.py is a stub so the top layer exists from the start (fleshed out in
the /healthz task). lint-imports green on the skeleton.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
ben.stull