Amsterdam-schema-tools

* Fix auth property for subfields. The subfields do not have
scopes, however, a scope can be defined on the parent field.

* Added an extra helper method to user-scopes to determine
if one of the fields has a scope that is blocking access.

* Some old definitions (gebieden.stadsdelen) are using temporal relations
defined as a plain string instead of an objects. The exporter
need to take this into account.

* Change export to only use active records for csv and jsonlines,
so, no historical records. Also brought the export more in line
with the csv export of the DSO-API:
- headers using capitalize()
- date-time in iso notation
- foreign keys only with an `identificatie` (no `volgnummer`)

* Updated Django version > 4.2
* Updated the github workflow to use postgres14 image

* Improve possibility to use git commit hashes when creating SQL migrations
from amsterdam schema table definitions. Now also supports schemas
with table definitions in separate files.