update purpose

You can have a daily Scheduler running which can extract Configuration log entries and you can filter out what you need from there. Configuration log captures information related to what all entities are created, edited, deleted, updated etc. You can use a snippet on scheduler subscription - QueryLogEntries on configuration log. One more way which might be more complex is, almost every entity holds a service called GetConfigurationChangeHistory. Which basically gives the changes made to that entity. To use this option you might have to loop through different types of entities and get the change history.