* make bookerUrl mandatory * add missing bookerUrl * add fallback * fix roundRObinReassignment * clean up * allow bookerUrl to be undefined * code clean up * make bookerUrl mandatory * fix type errors * fix type error --------- Co-authored-by: CarinaWolli <wollencarina@gmail.com> Co-authored-by: Joe Au-Yeung <65426560+joeauyeung@users.noreply.github.com>