fix(#613): 医生端医嘱列表增加退回原因展示列

根因（全链路6环分析）：
- ① 前端/页面 ❌ 医生端医嘱列表无退回原因列 → 无法展示护士填写的退回原因
- ② Controller ❌ 不涉及 — 纯转发层
- ③ Service ❌ getRequestBaseInfo() 未填充 reasonText 字段
- ④ Mapper/XML ❌ UNION ALL 查询未选取 back_reason/reason_text 字段
- ⑤ DB ✅ med_medication_request.back_reason 列已存在（上一次修复已迁移）
- ⑥ 关联模块 ⚠️ wor_service_request.reason_text 已存在但未在查询中暴露

修复：
1. RequestBaseDto.java: 新增 reasonText 字段（映射退回原因）
2. DoctorStationAdviceAppMapper.xml: 5 个 UNION ALL 分支各自选取 reason_text
   - med_medication_request → T1.back_reason
   - charge item 回补 → T2.back_reason
   - device_request（2 处）→ NULL（无退回原因字段）
   - wor_service_request → T1.reason_text
3. prescriptionlist.vue: 在诊断列前新增退回原因列

全链路状态流转：
护士端弹窗→输入原因→API传backReason→DB保存→医生端列表展示
                ↑ 本次修复打通最后一环 ↑

openhis-server-new/openhis-application/src/main/java/com/openhis/web/doctorstation/dto/RequestBaseDto.java

@@ -127,6 +127,11 @@ public class RequestBaseDto {
      * 请求状态
      */
     private Integer statusEnum;
+
+    /**
+     * 退回原因
+     */
+    private String reasonText;
     private String statusEnum_enumText;
 
     /**

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

@@ -517,6 +517,7 @@
         'med_medication_definition' AS advice_table_name,
         T1.medication_id AS advice_definition_id
         , T1.content_json::jsonb ->> 'remark' AS remark
+        , T1.back_reason AS reason_text
         FROM med_medication_request AS T1
         LEFT JOIN med_medication_definition AS T2 ON T2.ID = T1.medication_id
         AND T2.delete_flag = '0'
@@ -579,6 +580,7 @@
         'med_medication_definition' AS advice_table_name,
         T3.ID AS advice_definition_id
         , T2.content_json::jsonb ->> 'remark' AS remark
+        , T2.back_reason AS reason_text
         FROM adm_charge_item AS T1
         INNER JOIN med_medication_request AS T2 ON T2.ID = T1.service_id AND T2.delete_flag = '0'
         LEFT JOIN med_medication_definition AS T3 ON T3.ID = T2.medication_id AND T3.delete_flag = '0'
@@ -643,6 +645,7 @@
         'adm_device_definition' AS advice_table_name,
         CI.product_id AS advice_definition_id
         , NULL AS remark
+        , NULL AS reason_text
         FROM adm_charge_item AS CI
         LEFT JOIN adm_charge_item_definition CID ON CID.id = CI.definition_id AND CID.delete_flag = '0'
         LEFT JOIN wor_device_request DR ON DR.id = CI.service_id AND DR.delete_flag = '0'
@@ -698,6 +701,7 @@
         'adm_device_definition' AS advice_table_name,
         T1.device_def_id AS advice_definition_id
         , T1.content_json::jsonb ->> 'remark' AS remark
+        , NULL AS reason_text
         FROM wor_device_request AS T1
         LEFT JOIN adm_device_definition AS T2 ON T2.ID = T1.device_def_id
         AND T2.delete_flag = '0'
@@ -755,6 +759,7 @@
         'wor_activity_definition' AS advice_table_name,
         T1.activity_id AS advice_definition_id,
         T1.remark AS remark
+        , T1.reason_text AS reason_text
          FROM wor_service_request AS T1
         LEFT JOIN wor_activity_definition AS T2
         ON T2.ID = T1.activity_id