Reverse order of failed executions to show the latest on top

[kaka-ruto]

I often find myself scrolling through past failures to find the latest ones.

Should we reverse the order to always show the latest on top?

If this is a good change, I'm happy to give it a shot.

[rosa]

Hey @kaka-ruto, yes! It's not as trivial as it seems because we need to support Resque as well. More background on this PR: #114. Feel free to dig into that and continue with the work if you'd like! 🙏