fix(项目管理): 修复文件关联关系没有及时更新而导致的报错问题

--bug=1039483 --user=宋天阳 【项目管理】文件管理-文件详情，上一个/下一个操作，提示报错 https://www.tapd.cn/55049933/s/1498432

backend/services/project-management/src/main/java/io/metersphere/project/service/FileAssociationService.java

@@ -70,7 +70,7 @@ public class FileAssociationService {
         //组装返回参数
         List<FileAssociationResponse> responseList = new ArrayList<>();
         associationList.forEach(item -> {
-            if(fileIdMap.containsKey(item.getFileId())){
+            if (fileIdMap.containsKey(item.getFileId()) && sourceIdNameMap.containsKey(item.getSourceId())) {
                 FileAssociationResponse response = new FileAssociationResponse();
                 response.setId(item.getId());
                 response.setSourceId(item.getSourceId());