Feature Request: Show Upgrade History for CIP-68

[jonfmerz]

Thanks for the suggestion to add this over here: can you add functionality that lets users see their NFT upgrade history? I'm using the new CIP-68 from @SaturnNFTio for my graphic novel and I want readers to be able to see previous pages prior to upgrade. Right now, the upgrade basically "overwrites" the previous pages and readers may want to refresh their memories in between upgrades. Thanks very much (and I hope I posted this correctly, apologies if I did not)