BufferPaddingExecutor中的lastSecond的疑问

BufferPaddingExecutor中的lastSecond只有在创建BufferPaddingExecutor时赋值了一次，生成id时并没有再赋值。
这样的话会和自然时间偏差较大吧：比如5:00生成了一批id， 一直到8:00才有人使用，这时候lastSecond还停留在5:00

Locate BufferPaddingExecutor and trace where lastSecond is initialized and where IDs are generated. Compare that behavior with the elapsed wall-clock time described in the issue, then identify the expected handling and verify it with the repository's existing tests or a focused regression test.

Written by the indexing model from the issue text.