[Question] The number of edges I queried is inconsistent with the number of edges I imported

### Problem Type (问题类型)

others (please edit later)

### Before submit

- [X] 我已经确认现有的 [Issues](https://github.com/apache/hugegraph/issues) 与 [FAQ](https://hugegraph.apache.org/docs/guides/faq/) 中没有相同 / 重复问题 (I have confirmed and searched that there are no similar problems in the historical issue and documents)

### Environment (环境信息)

- Server Version: 1.0.0 (Apache Release Version)
- Backend: RocksDB x nodes, HDD or SSD
- OS: xx CPUs, xx G RAM, Ubuntu 2x.x / CentOS 7.x
- Data Size: 65608366 vertices, 1806067135 edges

### Your Question (问题描述)

I imported 65608366 vertices and 1806067135 edges. When I used `hugegraph-computer` or `gremlin` to query, the number of query edges was correct.

However, when I used "hugeClient.traverser().iteratorEdges(shard, 500)" to query the number of edges for each shard, and finally accumulated it, I found that there was an additional number of edges (1806312225 at this time). I don't know why the numbers were inconsistent. Can't we use "hugeClient. traverer(). iteratorEdges" to obtain the data size of all edges?

hugegraph-computer log:

gremlin result:

"hugeClient.traverser().iteratorEdges(shard, 500)" detail:
Step 1：Query all shards information (http://x.x.x.x:8065/graphs/hugegraph/traversers/edges/shards?split_size=1048576)
Step 2：Use "hugeClient. traverser(). iteratorEdges" to obtain the number of edges for each shard and then sum them。
result: Number of edges is 1806312225 , not 1806067135 .

### Vertex/Edge example (问题点 / 边数据举例)

_No response_

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

```javascript
{
"vertexlabels": [
{
"id": 1,
"name": "person",
"id_strategy": "CUSTOMIZE_NUMBER",
"primary_keys": [],
"nullable_keys": [],
"index_labels": [
"personByAge"
],
"properties": [
"id"
],
"status": "CREATED",
"ttl": 0,
"enable_label_index": true,
"user_data": {
"~create_time": "2023-03-13 09:52:29.084"
}
}
]
}

{
"edgelabels": [
{
"id": 1,
"name": "friend",
"source_label": "person",
"target_label": "person",
"frequency": "SINGLE",
"sort_keys": [],
"nullable_keys": [],
"index_labels": [],
"properties": [],
"status": "CREATED",
"ttl": 0,
"enable_label_index": true,
"user_data": {
"~create_time": "2023-03-13 09:52:30.760"
}
}
]
}
```