I believe this requires building a custom app for the Clover System. I have been looking into this and would be interested in hearing from others as well.
I have several questions about what you would like to see and how you would integrate this into your NVR / DVR. For me, I feel that being able to program keywords that would provide for an alarm event is the most common and legacy way of doing this. But I also would like to see a more up to date method that would database the transactions into a searchable method. Also, I would like to take full advantage of ONVIF integration and Picture in Picture versus Text overlay.
All feedback is welcome, and if you know of this already being done please save me the time and energy of having to build this myself.