ok. i went ahead and did the necessary coding, and this page is available to the masses now.
page: https://jumear.github.io/stirfry/iNat_observations_updates.html
code: https://github.com/jumear/stirfry/blob/gh-pages/iNat_observations_updates.html
i’m still not sure how useful it is (for my own purposes), but i think it should at least work on modern browsers. so have fun with it.