Introduce a RunLogBase type that encapsulates the base information
shared across multiple logs for the same run. This has the information
previously part of the API (Task and RunID), and includes the addition
of a RunScheduledFor timestamp.
Also remove the RunScheduled value for RunStatus, as it was never used
in the scheduler.
Also fix a handful of segfaults caused by improperly retained byte slices
from bolt, and combine two view transactions into one to avoid data
race when a delete happened between them.
In TestScheduler_RunLog, the run log gets updated asynchronously so we
need to poll to ensure we don't read a stale value.
In TestScheduler_CreateNextRunOnTick, we were previously reading the
one entry out of two from a map, so it was often the entry we weren't
interested in.
Lyon Hill
docmerlin (j. Emrys Landivar)
Mark Rushakoff
Jade McGough