Fix Bug #401: div_log 表中 pool_id 与 slot_id 存值不符

根因分析：
1. 候选池API（getCurrentDayEncounter）未返回 poolId/slotId 字段，导致护士从候选池
   添加患者到队列时 poolId/slotId 始终为 null
2. triage_queue_item 中 pool_id/slot_id 为 null 后，完诊时 div_log 也写入 null 值
3. 医生站完诊和护士站完诊各自独立写入 div_log，导致同一患者产生两条 COMPLETE 记录

修复方案：
1. CurrentDayEncounterTencentDto 新增 poolId/slotId 字段
2. TencentAppMapper.xml 通过 encounter.order_id → order_main.slot_id →
   adm_schedule_slot.pool_id 链路获取正确的号源信息
3. DoctorStationMainAppServiceImpl 增加防重复逻辑：队列项已为 COMPLETED 状态时
   不再重复写入 div_log（说明护士站已处理过）

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

openhis-server-new/openhis-application/src/main/resources/mapper/tencentJH/TencentAppMapper.xml

@@ -27,7 +27,9 @@
                T9.payment_id,
                T9.picture_url,
                T9.birth_date,
-               t9.english_name
+               t9.english_name,
+               t9.slot_id,
+               t9.pool_id
         from (
                  SELECT T1.tenant_id       AS tenant_id,
                         T1.id              AS encounter_id,
@@ -51,7 +53,9 @@
                         T13.id             AS payment_id,
                         ai.picture_url     AS picture_url,
                         T8.birth_date      AS birth_date,
-                        tx.staff_english_name AS english_name
+                        tx.staff_english_name AS english_name,
+                        om_slot.slot_id    AS slot_id,
+                        om_slot.pool_id    AS pool_id
                  FROM adm_encounter AS T1
                           LEFT JOIN adm_organization AS T2 ON T1.organization_id = T2.ID AND T2.delete_flag = '0'
                           LEFT JOIN adm_healthcare_service AS T3 ON T1.service_type_id = T3.ID AND T3.delete_flag = '0'
@@ -91,6 +95,8 @@
                  AND T13.status_enum = ${paymentStatus}
                      LEFT JOIN adm_invoice AS ai
                  ON ai.reconciliation_id = T13.id AND ai.delete_flag = '0'
+                 LEFT JOIN order_main AS om ON T1.order_id = om.id AND om.delete_flag = '0'
+                 LEFT JOIN adm_schedule_slot AS om_slot ON om.slot_id = om_slot.id
                  WHERE T1.delete_flag = '0'
                    AND T1.class_enum = #{classEnum}
                    AND T10.context_enum = #{register}