This brings down the number of type errors from 118 down to 92. I think most of the remaining errors are due to the */models.py files where I'm not sure what to do about it. I run the type checker in docker via `just typecheck`.
The change in 0af3fbcac4 requires this change upstream: https://github.com/valberg/django-registries/pull/28 we can omit that commit for now.
Reviewed-on: https://git.data.coop/data.coop/membersystem/pulls/81
Reviewed-by: benjaoming <benjaoming@data.coop>
Co-authored-by: Reynir Björnsson <reynir@reynir.dk>
Co-committed-by: Reynir Björnsson <reynir@reynir.dk>
