feat(data-management): 添加数据集父子层级结构功能

- 在OpenAPI规范中新增parentDatasetId字段用于层级过滤
- 实现数据集父子关系的创建、更新和删除逻辑
- 添加数据集移动时的路径重命名和文件路径前缀更新
- 增加子数据集数量验证防止误删父数据集
- 更新前端界面支持选择父数据集和导航显示
- 优化Python后端自动标注任务的路径处理逻辑
- 修改数据库表结构添加外键约束确保数据一致性

backend/services/data-management-service/src/main/resources/mappers/DatasetMapper.xml

@@ -4,12 +4,13 @@
 <mapper namespace="com.datamate.datamanagement.infrastructure.persistence.mapper.DatasetMapper">
 
   <sql id="Base_Column_List">
-    id, name, description, dataset_type, category, path, format, schema_info, size_bytes, file_count, record_count,
+    id, parent_dataset_id, name, description, dataset_type, category, path, format, schema_info, size_bytes, file_count, record_count,
         retention_days, tags, metadata, status, is_public, is_featured, version, created_at, updated_at, created_by, updated_by
   </sql>
 
   <sql id="Alias_D_Column_List">
         d.id AS id,
+        d.parent_dataset_id AS parent_dataset_id,
         d.name AS name,
         d.description AS description,
         d.dataset_type AS dataset_type,