Create a mascot from a brand book

One call that turns a brand book into a mascot. Send the brand book as public links (a PDF up to 50 MB, or PNG, JPEG or WebP pages up to 10 MB each) or images from POST /v1/upload, at most 30 pages in total. The job reads the brand book for free, generates every mascot view and prop it finds as a clean image for 1 credit each (at most 5 views and 12 props, so at most 17 credits), then creates the mascot in project_id with the views as labeled references and the description, colors, style, don'ts and props filled in. Poll GET /v1/jobs/{job_id}: step reports progress, and a completed job returns result.mascot_id with what it cost. Nothing is charged when the brand book has no mascot, costs more than max_credits, or the balance is short; each image that fails is refunded. Takes about 2 to 4 minutes. Counts toward the limit of 15 brand book readings per day. Use Idempotency-Key to retry without starting a second job.