Number of times the worker has been attempted so far. 0 means the job has been enqueued but not yet started.
Maximum number of attempts the worker is allowed before the job is marked "discarded".
Current execution state of the worker. One of "queued", "executing", "retrying", "completed", "discarded", or "cancelled".
Execution state of the background worker processing a routine run. Reflects the current job status and retry progress.