Feature flags causing a goofy build error

We added django-flags in https://github.com/cityofaustin/techstack/issues/3078

This is good

But there is a goofy error where migrations for django-flags were being prevented from running when loading data for the first time.

I added some specific error handiling to catch this so it dosen't break builds, so we are good for now.

However, we should investigate, understand the error, and prevent it from happening.