Docs: Update persistence docs to reflect latest audit changes

[BenjaminBossan]

The current persistence docs still reflect the state from before we added the audit feature. This should be updated soon, since we want people to test the feature and the documentation should be accurate for that.

[BenjaminBossan]

@adrinjalali will you take a stab at this, since you wrote the audit feature? If not, I can give it a try.

[adrinjalali]

Yes, it's on my list.