Demo data
Try Assay without your own data. The seed creates a demo schema in DATABASE_URL — customers, orders, payments and inventory with data problems planted in them — and 11 checks in MongoDB that find those problems.
npm run seed:demo
It only touches the demo schema and checks authored by demo-seed, so it is safe to run again; it resets them.
To fill the history straight away, run every check once:
DOTENV_CONFIG_PATH=.env.local npm run sql:run-all