test: add test for no pending migrations

program/tests/test_migrations.py

+import pytest
+
+from django.core.management import call_command
+
+pytestmark = pytest.mark.django_db
+
+
+# adapted from https://adamj.eu/tech/2024/06/23/django-test-pending-migrations/ for pytest
+def test_no_pending_migrations(capsys):
+    try:
+        call_command("makemigrations", "--dry-run", "--check")
+    except SystemExit:  # pragma: no cover
+        out, _ = capsys.readouterr()
+
+        raise AssertionError("Pending migrations:\n" + out) from None