[Question] Question title Confusion about code

### Search before asking

- [x] I had searched in the [issues](https://github.com/opengoofy/hippo4j/issues) and found no similar issues.


### Question

cn.hippo4j.config.service.ConfigCacheService#updateMd5

Why publish an event for a data change?
Is there any purpose?

<img width="852" alt="Image" src="https://github.com/user-attachments/assets/31694404-b8a8-438d-9cfc-20aecd9ebe43" />
