mongodb: Allow replacement of jobs in the past (when queue is inactive)

[thecodedrift]

DocMQ currently restricts replacement to jobs in the future to avoid altering a job that should already be processing. However, we can likely change the driver calls to allow the replace if:

• deleted is null (has not completed)
• and visible is in the past (as any acks on the job would also fail since they didn't ack or ping in time)

This would allow you to pause the queue, do inserts, and not run into collisions for replacing a job in the past that never ran.