This column holds a user ID issed by the single sign-on provider. For
Keycloak, it is an UUID. For more flexibility, we will be using a
standardly-sized VARCHAR field.
Signed-off-by: Lukas Fleischer <lfleischer@archlinux.org>
This way the database will get stamped, and Git will create the
`versions` directory without which Alembic won’t work.
Signed-off-by: Lukas Fleischer <lfleischer@archlinux.org>