bug#52487: [cuirass]: Feature request: Record the time of a failed build

[Mathieu Othacehe]

Hey,

> Looking at a page like this, we only have timestamps for "completed
> builds", but not for failures:
>
> https://ci.guix.gnu.org/search?query=gnome-41

We have timestamps for failed builds but not for failed-dependency
builds. This is now fixed with:
ca37049a70aaad59a1ed8e21db0de73f22b92622.

Thanks,

Mathieu