- Add PlantingService for planting order management
- createOrder: Create new planting order
- selectProvinceCity: Select province and city
- confirmProvinceCity: Confirm province/city selection
- payOrder: Pay for order
- getOrder/getMyOrders: Query orders
- cancelOrder: Cancel unpaid orders
- Register PlantingService in DI container
- Update planting_quantity_page to create order before navigation
- Update planting_location_page to call real API endpoints
- Fix referral-service event-ack.publisher to use KafkaService
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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>