* chore(pre-commit): match black version with requirements-dev
* run `make black` against repo
* ci: switch to black 24.4.2
* fix: py312
* fix: flake8 errors
* fix: flake8 conflicts
* chore: add git blame ignore revs file
RepoMirrorConfig in the current database migration version has a
non-null constraint on the internal_robot field, but the model in
database.py does not.
Updates the model to match the current database revision, and handles
delete api calls when there are mirrors still using the robot.
Also set a default test DATABASE_SECRET_KEY when generating the test.db
