Generating Realistic Seed Data That Respects Foreign Keys, in 20 Seconds

Someone asks for a demo. You need 10,000 users, 30,000 orders, a handful of products, and enough variety that the UI does not look fake. You have twenty minutes. If you have been here before, you know the options: Write a seed script. Open your editor, import Faker, write the loops, get the foreign keys wrong twice, rerun, get them right, run into a FOREIGN KEY constraint violation on line 847, swear. Use a CLI tool. Install something, read its YAML schema format, configure it, discover that it