This is a new field I just added manually:
```
ALTER TABLE items ADD COLUMN modeling_status_hint ENUM('done', 'glitchy');
```
Done means it's actually done being modeled, despite the heuristics telling us otherwise. And glitchy means there's DTI issues that prevent us from making progress on it.
I'm using my first ever MySQL Store Procedure for clever cleverness in caching the modeling query!
I realized that checking for the latest contribution timestamp is a pretty reliable way of deciding when modeling data was last updated at all. If that timestamp hasn't changed, we can reuse the results!
I figured that, because query roundtrips are a bottleneck in this environment, I didn't want to make that query separately. So, I built a MySQL procedure to do the check on the database side!
