I was trying to be too smart with caching, but if the `Play` method was
not called often enough it would have a recent reference. Unfortunately
this requires a separate query to `Entries`, but is also a special case
(no future hitobjects).
This also removes the time-based checks (result status alone should be
all we care about).
This changes the fallback logic to always prefer the previous resolved
lifetime entry rather than fallback to the first entry ever. I think
this is more correct in all cases.
Also rewrites the inline comments to hopefully be easier to parse.
