Create system notes on Incident timeline event behaviour

When an incident timeline event is edited, we should create a System Note on the underling Incident issue.

MVC ✅

Clock icon Sean Arnold @seanarnold edited incident timeline event Time stamp

In the the following scenarios we should create system notes:

• When a timeline event is added
• When a timeline event is edited
• When a timeline event is deleted

Nice to have

It would nice to know what was edited as well, but I don't know how hard that would be to do. For instance, can we clarify if it was the time/date that was edited, or the text? Something like this:

Clock icon Sean Arnold @seanarnold edited the event time/date on incident timeline event Time stamp

Clock icon Sean Arnold @seanarnold edited the text on incident timeline event Time stamp

Clock icon Sean Arnold @seanarnold edited the event time/date and text on incident timeline event Time stamp