Delivered: Complete e-commerce platform with product catalog, shopping cart,
checkout with saga orchestration, order management, and admin dashboard.

Key accomplishments:
- Modular monolith with CQRS, MediatR, and transactional outbox
- Product catalog with search, filters, and infinite scroll
- Shopping cart with guest support and optimistic UI
- Checkout saga with stock reservation and compensation handlers
- Admin dashboard with Kanban board and order management
- YARP API Gateway with JWT auth and rate limiting
- 180 automated tests (unit, integration, E2E)

See .planning/MILESTONES.md for full details.