OptionalonWhat a failure means for the rest of the workflow.
fail stops dependents; continue records the failure and releases them anyway, which is
what lets a workflow draw a recovery path instead of stopping dead; retry re-runs up to
retryCount before deciding.
OptionalretryHow many times to retry before the failure is final.
OptionaltimeoutHow long the step may run before the dispatcher abandons it, in seconds.
What the dispatcher does about time and failure for a single step.