I honestly have no idea why the heck we didn’t enable timestamps on that model. Short term you can use patch-package and inject
"options": {
"timestamps": true
},
On this file: strapi/User.settings.json at master · strapi/strapi · GitHub
And go forward with your cronjob idea (although if you are planning to scale horizontally or vertically you’ll need to go the custom route => external cronjob)