网络波动后导致获取连接失败

```
Apache.IoTDB.SessionPoolDepletedException: SessionPool depletion detected: Reconnection failed
---> Apache.IoTDB.ReconnectionFailedException: Error occurs when reconnecting session pool. Could not connect to any server
at Apache.IoTDB.SessionPool.Reconnect(Client originalClient, CancellationToken cancellationToken)
at Apache.IoTDB.SessionPool.ExecuteClientOperationAsync[TResult](AsyncOperation`1 operation, String errMsg, Boolean retryOnFailure, Boolean putClientBack)
--- End of inner exception stack trace ---
at Apache.IoTDB.SessionPool.ExecuteClientOperationAsync[TResult](AsyncOperation`1 operation, String errMsg, Boolean retryOnFailure, Boolean putClientBack)
at Apache.IoTDB.SessionPool.InsertRelationalTabletAsync(Tablet tablet)
at Apache.IoTDB.TableSessionPool.InsertAsync(Tablet tablet)
```

```
Apache.IoTDB.SessionPoolDepletedException: SessionPool depletion detected: Connection pool is empty and wait time out(2500s)
at Apache.IoTDB.ConcurrentClientQueue.Take()
at Apache.IoTDB.SessionPool.ExecuteClientOperationAsync[TResult](AsyncOperation`1 operation, String errMsg, Boolean retryOnFailure, Boolean putClientBack)
at Apache.IoTDB.SessionPool.InsertRelationalTabletAsync(Tablet tablet)
at Apache.IoTDB.TableSessionPool.InsertAsync(Tablet tablet)
```

因为使用的DDNS，中途出现IP变化网络波动后就再也连不上了，有概率出现

先追蹤 SessionPool.Reconnect 和 ExecuteClientOperationAsync，接著使用回報的 InsertAsync 路徑檢查 ConcurrentClientQueue.Take()。在連線期間重現 DDNS 位址變更，並確認工作階段集區能夠重新連線並復原，而不是維持空白或逾時。

由索引模型根據 Issue 內容生成。