fix(firstleg): avoid shared lock upgrades when initializing customs

firstleg/src/main/java/com/baiyue/firstleg/customs/container/mapper/ContainerCustomsMapper.java

@@ -88,9 +88,10 @@ public interface ContainerCustomsMapper {
     Long completedPlanForOrder(@Param("tenantId") long tenantId, @Param("orderId") long orderId);
 
     @Insert("""
-        INSERT IGNORE INTO fl_customs_container
+        INSERT INTO fl_customs_container
           (id,loading_plan_id,container_booking_id,status,created_at,updated_at,version)
         VALUES (#{id},#{planId},#{containerBookingId},#{status},CURRENT_TIMESTAMP(3),CURRENT_TIMESTAMP(3),0)
+        ON DUPLICATE KEY UPDATE id=id
         """)
     int insertContainer(@Param("id") long id,@Param("planId") long planId,
                         @Param("containerBookingId") long containerBookingId,@Param("status") String status);

firstleg/src/main/java/com/baiyue/firstleg/customs/container/service/ContainerCustomsService.java

@@ -563,9 +563,10 @@ public class ContainerCustomsService {
         if (!"COMPLETED".equals(plan.loadingPlanStatus())) throw conflict("装柜完成后才能处理报关资料");
         boolean refund = rows.stream().anyMatch(row -> "TAX_REFUND".equals(row.taxMode()));
         mapper.insertContainer(IdWorker.getId(), planId, plan.containerBookingId(), refund ? WAITING : READY);
-        // A concurrent INSERT IGNORE may wait for another request's insert to commit. The
-        // transaction's earlier plan reads can retain an RR snapshot that cannot see that row.
-        // Read the winning aggregate under its row lock, rather than reusing a snapshot read.
+        // The no-op upsert already takes an exclusive lock on a duplicate, avoiding the
+        // shared-to-exclusive lock upgrade of INSERT IGNORE followed by FOR UPDATE.
+        // Earlier plan reads may retain an RR snapshot predating the winning insert, so
+        // retrieve the real aggregate with a current read, not a snapshot read.
         ContainerRow container = mapper.lockContainer(planId);
         if (container == null) throw conflict("整柜报关记录初始化失败");
         return refresh(planId, container);