feat(REQ-3300) - 新增变洽签追加附件的功能逻辑

visa/visa-server/src/main/java/cn/axzo/nanopart/visa/server/service/impl/ChangeRecordRelationServiceImpl.java

@@ -298,6 +298,9 @@ public class ChangeRecordRelationServiceImpl extends ServiceImpl<ChangeRecordRel
     @Transactional(rollbackFor = Exception.class)
     public void appendAttachment(ChangeRecordAppendAttachReq req) {
         ChangeRecord visa = changeRecordService.getById(req.getVisaId());
+        AssertUtil.isTrue(Objects.equals(VisaStatusEnum.APPROVING, visa.getStatus())
+                || Objects.equals(VisaStatusEnum.COMPLETED, visa.getStatus()), "当前单据状态下不允许操作");
+
         AssertUtil.notNull(visa, "变洽签单据不存在");
         List<ChangeRecordRelation> existsAttach = findByCondition(VisaRelationDto.builder()
                 .visaId(req.getVisaId())