feat(orders): Stage 9A - WooCommerce Orders API integration
- Extend OrderStatus with onHold, refunded, failed
- Extend OrderItem with productId, variationId, customizations
- Extend Order with paymentMethod, source, customFields
- Add OrderSource enum (online, market, manual)
- Add getOrder(id) to OrdersRepository contract and FakeOrdersRepository
- Add WooCommerceOrderMapper (WooCommerce JSON <-> Order domain)
- Add WooCommerceOrdersRepository implementing full OrdersRepository
- Add orders API methods to WooCommerceApiClient (getOrders, getOrder,
updateOrderStatus, createOrder, addOrderNote)
- Export WooCommerceApiClient/WooCommerceApiException from feature_wordpress
- Add feature_wordpress + http dev deps to feature_orders pubspec
- 83 new tests: mapper (25), repository+API client (23), FakeRepo.getOrder (3),
plus existing suite grows to 198/198 feature_orders
- All packages analyze clean; 847/847 total tests passing
- Update master_development_brief.md and build_execution_tracker.md
Mike Kell
e92788038a