In a217ebe7 and 99ba41d8, I added functionality to track changes to events and
shifts. It works okay, but it turned out to be actually really difficult to see
the differences we cared about. Part of it is how we added and removed tasks
instead of updating the list, part of it was because of how we split events.
Over the course of the two months it's been installed, I haven't been able to
use it to find anything useful.
On top of that, it takes up the most space by a couple orders of magnitude. in
our database and grows very quickly. I looked into reducing what it stores, but
I wasn't confident that it would help instead of hinder the debugging process.
And since then I added HttpRequest logging (e4d3a589) which has already helped
find one bug in less than a month and takes up far less space.