chore(deps): update dependency django-parler to v2.4

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
django-parler	2.3 → 2.4

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Release Notes

edoburu/django-parler (django-parler)

v2.4

Compare Source

Attention: django-parler 2.4 induces migrations to translated models by replacing unique_together be a unique constraint. This missing migration can show up as a warning.

• Added Django 6.0 support.
• Added Python 3.13 support.
• Dropped Django 4.2 LTS support (end of extended support, April 2026).
• Dropped Django 5.0 support. The admin's delete_translation view calls
  ModelAdmin.log_deletions, which was introduced in Django 5.1 — so
  translation deletion raised AttributeError on 5.0. The install
  requirement is now Django>=5.1.
• Replaced removed csrf_protect_m decorator with @method_decorator(csrf_protect) in the admin.
• Replaced deprecated unique_together with models.UniqueConstraint in the translated fields model.
• Added a validate_constraints() call alongside validate_unique() in form validation so UniqueConstraint violations surface through the form.
• Updated log_deletion() call to the renamed log_deletions() with its new signature (Django 6).
• Fixed a thread-safety bug in SortedSelectMixin.sort_choices() where the deep-copy guard was skipped for the second and later optgroups, causing .sort() to mutate the caller's choices list.
• Expanded the test suite with new modules covering admin views, cache, forms, managers, model construction, template tags, views, and widgets.
• Test matrix: Django 5.1, 5.2, 6.0 × Python 3.10–3.13.

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