Persist image submissions with fixed idempotency keys, leased execution, provider
identity, reference snapshots and staged results. Integrate DIY, assisted assembly
and non-integrated white-background sessions without holding generation in a
browser request. Recover ambiguous submissions through owner-scoped reads and
stop a new eight-view batch when restoring an earlier request.
Add the NativeImageGenerationJob migration and a dedicated worker to both release
entry points. Protect job inputs/results from storage GC. Existing production
configuration and business data are not changed by this commit.
Validation: 256 focused Jest tests, isolated PostgreSQL migration/lease/transaction
checks (8), deployment guard tests (9), type-check, production build and desktop/
mobile browser component scenarios. Live native 2K reference-image request worked;
reusing its idempotency key returned the same task. Build uses local placeholders
for otherwise absent Drawing System configuration. Three unrelated material tests
also fail with the original mainline test file; they remain outside this change.
Architecture/visual/root-cause review: passed with warnings. Independent review
completed for the integration and shared input/storage paths; worker additionally
reviewed by the primary agent. Production merge/deployment requires authorization.
