delete_users: only project models; Django admin history (LogEntry.user_id is staff) was being counted

Account deletion also keeps the status log of the payment records it keeps.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

accounts/tests_delete_users.py

@@ -63,3 +63,15 @@ class DeleteUsersTests(TestCase):
         self.run_command('--ids', str(self.doomed.pk), str(self.kept.pk), '--yes', '--skip-paid')
         self.assertTrue(User.objects.filter(pk=self.doomed.pk).exists())
         self.assertFalse(User.objects.filter(pk=self.kept.pk).exists())
+
+    def test_django_admin_history_is_never_touched(self):
+        from django.contrib.admin.models import LogEntry
+        from django.contrib.auth.models import User as StaffUser
+
+        from accounts.management.commands.delete_users import user_scoped_models
+
+        self.assertNotIn(LogEntry, [model for model, _ in user_scoped_models()])
+        staff = StaffUser.objects.create(id=self.doomed.pk, username='staff')
+        LogEntry.objects.create(user=staff, action_flag=1, object_repr='x')
+        self.run_command('--ids', str(self.doomed.pk), '--yes')
+        self.assertEqual(LogEntry.objects.count(), 1)