This is a dev subtask to allow us to actively work against this while the parent ticket can be in design. In this particular subtask I think it's best that all discussions live on the parent ticket for this.
Initial endpoint details are in this comment.
Questions for Engineering:
Can we reuse the existing sparkline and it's data source in history for this?
Will we be able to translate the html snippets that are coming out of the endpoint into native views via String+HTML.swift?