[Bug] 使用 hugegraph-tool 备份全部图数据库时导出的edges数量为0

### Bug Type (问题类型)

logic (逻辑设计问题)

### Before submit

- [X] 我已经确认现有的 [Issues](https://github.com/hugegraph/hugegraph/issues) 与 [FAQ](https://hugegraph.github.io/hugegraph-doc/guides/faq.html) 中没有相同 / 重复问题

### Environment (环境信息)

- hugegraph-0.10.4
- hugegraph-tools-1.4.0
- OS: xx CPUs, xx G RAM, Centos 7.x
- Data Size: xx vertices, xx edges

### Expected & Actual behavior (期望与实际表现)

使用rest api查询edges的时候能查到存在边的数据, 而在使用hugegraph-tool进行数据备份的时候发现edges备份数量是0


### Vertex/Edge example (问题点 / 边数据举例)

_No response_

### Schema [VertexLabel, EdgeLabel, IndexLabel] (元数据结构)

_No response_

Start by reproducing the backup with hugegraph-tool 1.4.0 against HugeGraph 0.10.4, comparing the REST API edge count with the exported backup. Trace the backup flow and its edge-querying entry point; done means the backup contains the existing edges and its count matches the source database.

Written by the indexing model from the issue text.