fix(firstleg): freeze customs receipt after broker submission

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

@@ -205,6 +205,9 @@ public class ContainerCustomsService {
         if (container == null || !DECLARING.equals(container.status()) || source.frozenAt() == null) {
             throw conflict("当前客户资料不在报关中冻结版本");
         }
+        if (mapper.brokerSubmittedAt(container.id()) != null) {
+            throw conflict("客户确认回执已发送给报关行，不可再修改回执");
+        }
         CompletionRow completion = mapper.lockCompletion(documentId);
         CustomsFileClient.Metadata metadata = upload(source.tenantId(), RECEIPT_FILE_TYPE, Long.toString(container.loadingPlanId()), operatorId, file);
         long completionId;