* Refactor descendant enumeration in DeliveryApiContentIndexHelper Improved loop condition to allow for processing of more than 10.000 descendants for indexing. * Add failing test for original issue. * Renamed variable for clarity. --------- Co-authored-by: Brynjar Þorsteinsson <brynjar@vettvangur.is> Co-authored-by: Andy Butland <abutland73@gmail.com>