Update constaints for Django 5

[devanubis]

Django 5 added:

• BaseConstraint.violation_error_code and corresponding __init__ parameter.
• CheckConstraint.conditionto replacecheckand correspondinginit` parameter.
  • The use of check now emits a Django6 deprecation warning, but can't change it without updating the types.

https://github.com/django/django/blob/stable/5.1.x/django/db/models/constraints.py

[devanubis]

Actually, I've just checked and django-stubs already fixed both of these, and better than me with an @overload.

• typeddjango@2dcf1bf
• typeddjango@ead941f

Would  you prefer a cherry-pick of those as separate PRs?

Or do you have any immediate plans to update from django-stubs ? I noticed #255...