Feature request: Per-line creation/modification timestamps?

Hi,

I plan to use Bear as a kind of lab notebook, where each note may record an experiment that may be performed over days or weeks. For this purpose, it would be very handy to be able to know which parts of a note were created or modified when - I imagine optionally being able to display timestamps either in the margin or when mousing over a line.

Would also love being able to revert to (or at least browse) previous versions of a note.

Cheear,
Oli