AdviceManageAppMapper.xml: replace NULL AS remark with scalar subquery
from wor_service_request for both medication and device request branches.
DoctorStationAdviceAppMapper.xml: add remark column to 5 sub-queries
- 3 via wor_service_request scalar subquery
- 1 as NULL (charge items without matching service request)
- 1 as T1.remark (direct from wor_service_request)