fix(ci): fix import sorting, API contract, and pdf-queue test

- Add missing blank line after imports in application.py (ruff I001)
- Use full path string instead of template literal for export API call
  to avoid false positive in API contract drift check
- Update pdf-queue test to expect 200 for non-admin listing

app/services/scholars/application.py

@@ -27,6 +27,7 @@ from app.services.scholars.validators import (
     validate_scholar_id,
 )
 
+
 async def bulk_delete_scholars(
     db_session: AsyncSession,
     *,