ZGW registration backend: validation that domain's must be uppercase seems incorrect

[alextreme]

Product versie / Product version

3.0.1

Customer reference

Taiga Brabantse Delta #40

Omschrijf het probleem / Describe the bug

When integrating with Djuma we came across a catalog which isn't fully uppercased.

I know in Open Zaak that having a domain in capitals is mandatory, however this doesn't seem to be part of the ZGW API standard

https://redocly.github.io/redoc/?url=https://raw.githubusercontent.com/VNG-Realisatie/catalogi-api/1.3.1/src/openapi.yaml#tag/catalogussen/operation/catalogus_create

I would suggest to replace this validation check with one that allows upper and lowercase characters

open-forms/src/openforms/contrib/zgw/serializers.py

Line 32 in 46f3859

validators=[validate_uppercase],

For further details see the Taiga issue

[joeribekker]

Refinement: This isnt a bug in Open Forms since the ImZTC does require it. I don't blame Djuma for not knowing (well, a little since they are used to StUF-ZDS) because its not in the API spec.

We can however relax this on our side since Open Forms doesnt need to enforce a requirement when reading a catalog.

[joeribekker]

ie. we'll remove the validation