Patch payment validator for Django 5 compatibility

scripts/validate_payment_provider_config.py

@@ -10,6 +10,12 @@ def main() -> int:
     project_root = Path(__file__).resolve().parents[1]
     os.environ.setdefault("DJANGO_SETTINGS_MODULE", "mandelstudio.settings.base")
     os.chdir(project_root)
+    if str(project_root) not in sys.path:
+        sys.path.insert(0, str(project_root))
+
+    from mandelstudio.main import _patch_legacy_django_translation_aliases
+
+    _patch_legacy_django_translation_aliases()
 
     import django