Hi @hranjan3
I tried to gave it some thought and if you want to achieve the requirement from only ISC then i think you could try to have a scheduled workflow in place which may run every night.
This workflow should make call to workflow execution API with the id of the workflow that is currently sending the emails with start date and end date filter (See below link to the document which states that it is possible to get the information about workflow execution with start date and end date) and then loop over the executions in such a way that you can extract the information of type of email was sent (joiner leaver or mover etc). I believe then you can send another email to your mailbox to have these information.
I hope this helps.
Thank You.
Regards
Vikas.