Got intervals updating properly. Next, make it so newly scored points
trigger the rescoring of nearby points!
Got the scores using surrounding context by the quick expediant of
simply re-time scoring everything in the range (and a little extra) of
the IDs specified. However, now seeing absscore values of 0, which
should not occur in this test. They appear to be happening for values
around 540 and 1000 (the ends).
Fixed the issue. Now the late arrival test works.