Django 6.0 support

[Phoul]

Django 6.0 was officially released today (https://www.djangoproject.com/weblog/2025/dec/03/django-60-released/), so just opening to track the request for future support.

Thanks!

[uraniumanchor]

Unfortunately 6.0 seems to have introduced a regression in the migration code, because the 0045 migration that is supposed to migrate the old host/commentator tables to the Talent table doesn't work in 6.0, complaining that the new M2M table doesn't exist. I'll see if I can make a minimum repro case and submit a bug report some time this week.

[uraniumanchor]

This commit: django/django#20411 django/django@6cc1231 appears to fix the regression, so we'll have to wait for 6.0.1.