Fix Bug #456: 门诊医生站：诊疗类医嘱保存后类型变更为"检查"且签发成功后状态未更新

根因：getRequestBaseInfo SQL 查询中 wor_service_request 的 advice_type 计算
使用了 COALESCE(T1.category_enum, 3)，导致 category_enum=23(检查) 时
返回 advice_type=23 而非 3(诊疗)，前端将 23 特殊映射为"检查"显示

修复：将 ELSE COALESCE(T1.category_enum, 3) 改为 ELSE 3，确保所有
诊疗子类型（检查/检验/治疗等）统一返回 advice_type=3

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

openhis-server-new/openhis-application/src/main/resources/mapper/doctorstation/DoctorStationAdviceAppMapper.xml

@@ -647,7 +647,7 @@
         AND T1.refund_device_id IS NULL
         ORDER BY T1.status_enum)
         UNION ALL
-        (SELECT CASE WHEN T1.category_enum = 4 THEN 6 ELSE COALESCE(T1.category_enum, 3) END AS advice_type,
+        (SELECT CASE WHEN T1.category_enum = 4 THEN 6 ELSE 3 END AS advice_type,
         T1.id AS request_id,
         T1.id || '-3' AS unique_key,
         '' AS prescription_no,