- Add rlz_service_type and rlz_price_history tables
- Add backend entities, mapper, service, and controller for /system/serviceType
- Add frontend Vue page with list/create/edit/price update/price history
- Add sys_menu entries and role permissions for admin role
- Add admin backend module planning document
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>