hubble 图查询，无法正确的扩展节点

### Bug Type (问题类型)

gremlin (结果不合预期)

### Before submit

- [X] I had searched in the [issues](https://github.com/apache/hugegraph-toolchain/issues) and found no similar issues.

### Environment (环境信息)

- Server Version: 1.3.0
- Toolchain Version: 1.3.0

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

点击：['tag:收益目标']目标节点，无法扩展，显示，没有更多节点。
我使用 gremlin语句直接查询server ：可以查到关联的边和节点。

### Vertex/Edge example (问题点 / 边数据举例)

_No response_

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

_No response_

The report points to Hubble's graph-query node-expansion flow and contrasts it with a direct Gremlin query against the server. Start by comparing the request made when expanding the `tag:收益目标` node with the working server query; done means the related edges and vertices appear in Hubble. No source file or test is named, and the vertex, edge, and schema examples are missing.

Written by the indexing model from the issue text.