Upgrade Django from 5.2 to 6.0 (#20).

Align Model.save with keyword-only Django 6 API, fix recaptcha score widget usage, and make Payments.date use a callable default.

schasite/models.py

@@ -12,13 +12,13 @@ class TimeInfoBase(models.Model):
     class Meta:
         abstract = True
 
-    def save(self, *args, **kwargs):
+    def save(self, **kwargs):
         if not kwargs.pop("skip_last_modified", False) and not hasattr(self, "skip_last_modified"):
             self.last_modified = timezone.now()
             if kwargs.get("update_fields") is not None:
                 kwargs["update_fields"] = list({*kwargs["update_fields"], "last_modified"})
 
-        super().save(*args, **kwargs)
+        super().save(**kwargs)
 
 # Create your models here.
 class UsefulLinks(TimeInfoBase):
@@ -148,7 +148,7 @@ class MembershipServices(TimeInfoBase):
 
 
 class Payments(TimeInfoBase):
-    date = models.DateField(default=timezone.now())
+    date = models.DateField(default=timezone.now)
     status = models.CharField(default="Completed", max_length=256)
     email = models.EmailField(blank=True, null=True)
     person = models.ForeignKey(