fix: create directory for stats files if needed (#6208)
fix: create directory for stats files if needed (#6208)

This avoid lots of error message on make dev
openfoodfacts/openfoodfacts-server,openfoodfacts/openfoodfacts-server,openfoodfacts/openfoodfacts-server,openfoodfacts/openfoodfacts-server,openfoodfacts/openfoodfacts-server