[I] [Bug] 使用postgre作为backend数据库创建了多个连接，且连接没有自动关闭 [incubator-hugegraph]

[via GitHub]

FearlessPeople opened a new issue, #2801:
URL: https://github.com/apache/incubator-hugegraph/issues/2801

   ### Bug 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: 1.5.0 (Apache Release Version)
   - Backend: postgresql
   - OS: Ubuntu
   - Data Size:  xx vertices, xx edges <!-- (like 1000W 点, 9000W 边) -->
   
   
   ### Expected & Actual behavior (期望与实际表现)
   
   `bin/start-hugegraph.sh`启动完hugegraph后， 数据库会出现很多连接，我这里是76个连接
   
   这些连接没有被自动释放或关闭，只有我`bin/stop-hugegraph.sh`后才会关闭
   
   
![Image](https://github.com/user-attachments/assets/90e09ca3-944f-415b-a515-ff656ab1e594)
   
   
   ### Vertex/Edge example (问题点 / 边数据举例)
   
   ```javascript
   
   ```
   
   ### Schema [VertexLabel, EdgeLabel, IndexLabel] (元数据结构)
   
   ```javascript
   
   ```


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