506 门诊挂号：门诊诊前退号后，数据库多表状态值变更与 PRD 定义不符

CommonConstants.AppointmentOrderStatus 常量 → OrderStatus 枚举重构
   新增枚举：0=患者取消 / 1=有效 / 2=系统取消 / 3=已完成
   退号流程加乐观锁防并发，slot 状态改回待约，退号日志独立事务 修复 XML 中 Integer 比较用字符串的问题
Bug #411 — 诊室过滤栏从科室下拉框改为诊室按钮组

openhis-server-new/openhis-domain/src/main/resources/mapper/clinical/OrderMapper.xml

@@ -117,12 +117,14 @@
         </where>
     </select>
 
+    <!-- status=1: 只查有效订单(0=患者取消 1=有效 2=系统取消 3=已完成) -->
     <select id="selectOrderById" resultMap="OrderResult">
         select * from order_main where id = #{id}
         and status = 1
         order by create_time desc
     </select>
 
+    <!-- status=1: 只查有效订单 -->
     <select id="selectOrderBySlotId" resultMap="OrderResult">
         select * from order_main where slot_id = #{slotId} and status = 1
     </select>
@@ -248,8 +250,9 @@
         update order_main set status = #{status} where id = #{id}
     </update>
 
+    <!-- status=0: 患者取消 (OrderStatus.PATIENT_CANCELLED) -->
     <update id="updateOrderCancelInfoById">
-        update order_main set status = 3, cancel_time = #{cancelTime}, cancel_reason = #{cancelReason} where id = #{id}
+        update order_main set status = 0, cancel_time = #{cancelTime}, cancel_reason = #{cancelReason} where id = #{id}
     </update>
 
     <update id="updatePayStatus">