NextProcessableIndex
EventCount
Intended to address concerns raised in https://github.com/ppy/osu/pull/30620#issuecomment-2475744164.
It's not the 1970s. We can spare a few extra letters.
CalculateAverageHitError
HitEvent
Leading up to implementation of "local offset", this feels like a good thing to have visible first and foremost.
Also unifies UR calculation logic with the results screen statistic item to reduce duplication.