Adding maintained field to schema

[theodore-s-beers]

I did the first steps of this in #419. There is now a maintained field, pretty much at the top level of the schema. I didn't see an existing category in which it seemed to belong.

maintained is currently defined as a nullable boolean. i.e., it should be true or false, but it can optionally be null, at least for the time being, while we work to update existing entries.

I've also added this field to every current database entry. And it's null everywhere—but this is just a starting point. All tests are passing, and we can improve our data over time. I do have some ideas for detecting entries for which maintained must be true. For example, we can search for projects that have defined funding periods that are still active. I would be comfortable saying that currently funded == maintained. (The entire problem is that the inverse does not hold…)

Anyway, if this field doesn't work out for one reason or another, or if it proves more hassle than it's worth, we can always remove it. @XeniaMonika, we should probably bump the schema version (to 0.2.2?). @Jomula, this may become an occasion for publishing new releases on GitHub and Zenodo.

[theodore-s-beers]

In #421, I was able to set maintained to true for 56 entries (or some number close to that). I just wrote a script to identify projects that have defined funding periods that continued at least into 2023. Those are now marked as maintained as a matter of course. Separately, it occurred to me that most organizations—though not all—remain active over a longer period of time. So I looked at those as well, and felt comfortable setting maintained to true in all but a few cases.

[XeniaMonika]

I have bumped the schema and set the maintained value to false for 11 projects I have already marked as such during my research for the taxonomy.

[XeniaMonika]

closed with #423

[theodore-s-beers]

Ok. We can leave the issue "closed," while continuing to update our records. Should just remember to follow up with Jonas about publishing another release of our schema and database.

[Jomula]

Reopened for release task

[Jomula]

Reopened because I still need to do the release :P

[XeniaMonika]

Sure! My bad

[Jomula]

Made a release: https://zenodo.org/records/10391227