- When a job needs to go dependent on another job, we no longer use recursion
to manage the execution stack. Instead the job is simply marked as waiting
and we execute other jobs with no dependencies in the meantime. When a job
completes, all dependents are moved back onto the unscheduled list and
executed as needed.
- Adjustments to ResolveValueNodeJob to handle the now asynchronous nature
of waiting.
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