refactor(task): 优化重复任务处理逻辑

- 移除旧任务更新逻辑，简化重复任务处理流程
- 替换视频查询方法调用，使用新的存储库方法
- 保持任务缓存清除功能
- 简化日志输出信息

src/main/java/com/ycwl/basic/service/task/impl/TaskTaskServiceImpl.java

@@ -440,19 +440,11 @@ public class TaskTaskServiceImpl implements TaskService {
                 memberVideoEntity.setTaskId(taskEntity.getId());
             } else {
                 TaskRespVO existingTask = list.getFirst();
-                log.info("重复task，更新旧任务! faceId:{},templateId:{},taskId:{}", faceId, templateId, existingTask.getId());
-                // 更新旧任务：重置status为0，更新taskParams
-                TaskEntity taskUpdate = new TaskEntity();
-                taskUpdate.setId(existingTask.getId());
-                taskUpdate.setStatus(0);
-                taskUpdate.setTaskParams(JacksonUtil.toJSONString(sourcesMap));
-                taskMapper.update(taskUpdate);
-                // 显式清除workerId（update方法的动态SQL会跳过null值）
-                taskMapper.deassign(existingTask.getId());
+                log.info("重复task! faceId:{},templateId:{},taskId:{}", faceId, templateId, existingTask.getId());
                 videoTaskRepository.clearTaskCache(existingTask.getId());
 
                 memberVideoEntity.setTaskId(existingTask.getId());
-                VideoEntity video = videoMapper.findByTaskId(existingTask.getId());
+                VideoEntity video = videoRepository.getVideoByTaskId(existingTask.getId());
                 if (video != null) {
                     IsBuyRespVO isBuy = orderBiz.isBuy(existingTask.getScenicId(), face.getMemberId(), face.getId(), 0, video.getId());
                     if (isBuy.isBuy()) {