[Bug] count() is not de-duplicated

### Bug Type (问题类型)

gremlin (结果不合预期)

### 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)

- Server Version: v0.12.0
- Backend: memory
- OS: ubuntu 8 CPUs, 32 G RAM
- Data Size: 5000vertices, 10000 edges

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

when i was querying overlapping fields, duplicate results were not de-duplicated by "count()". the query is "String query = “g.V().has('length', between(-433,2678).or(lte(500))).count()”;"

### Example to reproduce:
```
hugegraph.schema().vertexLabel("type").properties("length").nullableKeys("length").create(); hugegraph.schema().indexLabel("typebylength").onV("type").by("length").shard().ifNotExist().create();

Vertex v1 = new Vertex("type").property("length", 546);
Vertex v2 = new Vertex("type").property("length", 1);
Vertex v3 = new Vertex("type").property("length", 3000);

graph.addVertices(Arrays.asList(v1 , v2 , v3));

String query = “g.V().has('length', between(-433,2678).or(lte(500))).count()”;
```
### Expected: return 2
### Actual behavior: return 3

### Vertex/Edge example (问题点 / 边数据举例)

```javascript
No response
```

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

```javascript
No response
```

Start by reproducing the issue with the provided schema, vertices, and Gremlin query against HugeGraph v0.12.0 using the memory backend. Trace how the overlapping `between(...).or(lte(...))` condition is processed before `count()`. Done means the example returns 2 rather than 3, with regression coverage for the query behavior.

Written by the indexing model from the issue text.