I've looked a bit more for museum collection management software... and I am amazed at how many different options and solutions there are. Most of them, however, will upload or import or otherwise duplicate an existing file. Most of them are also designed to run on a server (though that is something that I could work with), which makes perfect sense for an accessible database, and are accessed through the browser. (Also workable.)
However, it takes a bit of time to skim the documentation for each of the options to see if it might be suitable for my purposes... and that's where I'm still stuck, skimming stuff and figuring out which one may be worth a try.
That's all happening in little bits of time inbetween "proper" work stuff, though. With extra help from the little cat today (who has been putting her paw down on the touchpad more than usual...). But I won't complain too much about having a fluffy companion while working!
Having the cat relax and hang out on the desk also means that I get to sneakily shorten her claws as necessary. She's not active enough anymore to keep all the claws short enough through wear and tear, and the tendons in older cats sort of wear out as well and don't retract everything as completely as it should be... and that has actually caused her issues with walking. Plus claw snags, which may look funny, but must be rather annoying and sometimes probably also painful. So we got a claw trimmer (human nail clippers have the wrong shape) and now we're keeping her claws short enough that they don't bother her.
Fortunately she's fine with having her paws handled; the only really difficult claw is the thumb claw, but even that is unsupervised and standing out sometimes, in some sleepy positions. And then, snip!, it is suddenly a little shorter. And Madame is a good bit happier - not strictly in that moment, but overall, since being able to walk without pain is definitely a great factor in personal happiness!