We are starting to see lots of 100.0%s in the current table
and we think this looks suspiciously too good so think it is
beneficial to change it to be 2dp such that we get a few more
non 100.0% values.
This will put all the values in to having 2dp, however it will
also require the API to have a change to
https://github.com/alphagov/notifications-api/blob/master/app/performance_dashboard/rest.py#L81
where it is currently losing the granularity down to a single
decimal place (meaning that if we were really at 99.894% then that
would be shown on the page as 99.90% rather than 99.89%). However,
I don't think it is a blocker that we get that sorted before this
can be merged.
This uses the existing endpoint so it matches what’s on the homepage.
It will be more up-to-date than the list of services, but no-one’s going
to be adding things up to check they match exactly.
This matches the existing performance platform page, and I think is a
bit easier to read for high-level numbers where you don’t need to see
that they’re changing second-by-second.
