Add payment provider validation entrypoint

scripts/validate_payment_provider_config.py

@@ -0,0 +1,26 @@
+#!/usr/bin/env python3
+from __future__ import annotations
+
+import os
+import sys
+from pathlib import Path
+
+
+def main() -> int:
+    project_root = Path(__file__).resolve().parents[1]
+    os.environ.setdefault("DJANGO_SETTINGS_MODULE", "mandelstudio.settings.base")
+    os.chdir(project_root)
+
+    import django
+
+    django.setup()
+
+    from mandelstudio.launch_validation import validate_payment_provider_config
+
+    validate_payment_provider_config()
+    print("Payment provider configuration validation passed.")
+    return 0
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())