Implemented DeliveryTask, Payment, and Sale entities with full CRUD, business logic, and API endpoints. Updated Order/OrderItem for sale linkage and fulfillment tracking. Registered new DbSets and DI services. Revised documentation for delivery, sale, and payment workflows.
- 03_ride_lifecycle.md: Updated pending tasks note to only mention tests for new services, removing reference to database migrations.
- mainPlan.md: Changed status of "Store Management (Beyond CRUD)" (step 12) from "In Progress" to "Done".