==== Technical background
In T368151 we added two central tables, `cuci_temp_edit` and `cuci_user`, to keep track of which wikis have been recently edited by a temporary user from a particular IP address and to keep track of which wikis have edited by a given user respectively.
Both tables hold a timestamp column, and then a few other columns which make each row unique.
Before we can start to use this table for GUC / global autoblocks, we will need to populate it with existing data. CheckUser already has some maintenance scripts for populating other tables (see `CheckUser/maintenance` directory).
This work can only start once T371788 is complete, to ensure that no entries are lost. Therefore, this script should also be able to handle cases where the data to be populated matches the data already in the table.
==== What needs doing
* [] Create a maintenance script for adding temporary user edits to the `cuci_temp_edit` and `cuci_user` tables
* [] Add this maintenance script to `update.php`
* [] Run this maintenance script on all wikis