feat: replace Stripe with Mollie payments + TBFF revenue split to bonding curve
- Swap stripe SDK for mollie-api-python (Dutch data residency, PCI-DSS L1)
- Mollie redirect checkout flow: create payment → hosted page → webhook
- Rename DB columns: stripe_session_id → payment_id, add payment_provider
- Add revenue split: configurable fraction of each sale deposits to
flow-service TBFF funnel → Transak on-ramp → bonding curve ($MYCO)
- Add checkout success page with cart cleanup
- Add backlog tasks for remaining work
- Remove @stripe/stripe-js from frontend, Stripe env vars from Docker
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Jeff Emmett
b437709510