Credit balances

In one sentence

Users need at least one image credit to queue a render; the worker deducts the credit only after the render row is inserted.

Current behavior

auth_user_has_credits() / auth_user_consume_credit() map types to users.image_credits / users.story_credits. If deduction fails after insert, the worker deletes the render and fails the queue item.

Known limitations

• Pre-check at submit + later deduction allows race conditions under concurrent submissions.
• upscale_credits / video_credits are referenced elsewhere without confirmed schema creation.

Related functionality

• Queue submission
• Background render processing
• Credit-pack purchases