Hope to store the historical data of the rssfeed

### Description

1. Some rss updates faster and historical information is quickly flushed out. I hope it can be stored in glance. Another very common situation is that some subscriptions in rsshub are not successfully accessed every time. If storage can be added, the data can be stored to provide reading when it is successfully accessed.
2. The disadvantages may be that some development work is required and the resource requirements of glance are increased.
3. I don't have development experience in rss information backend storage. Based on my other experience, I may be able to use the sqlite database? Configure the sqlite address when backend storage is required
4. Judging from what I've used，[follow](https://follow.is/) and [NetNewsWire](https://github.com/Ranchero-Software/NetNewsWire) both well