SQLite-backed CofferProduct with company vs agent books, immutable tx log,
200c Coffer→Leora build contract as first business tx, 40c signup grant,
20c seat via Coffer with 1% cut (19.80c to New Internet Co), shirt catalog,
CLI (python -m coffer), and tests. Centicredits for reseller settlement.
Quarry 3005d129.
Buyers pay Coffer in whole agent credits. Promotional lots are spent
before funded lots. There is no cash-out. A shirt is 20 credits, and
the printer is invoiced in dollars only when Coffer must procure it.
