Add docs on preventing queue from picking up jobs

[pburdette]

Is your feature request related to a problem? Please describe.

Recently I had an issue where my worker quit processing jobs completely. I had to drain the queue and I think that was the ultimate fix. But still unsure at the moment.

Describe the solution you'd like

Adding docs for this use-case and how to prevent it happening again would be great. I.E listen for these events with your worker and handle the job like so, to prevent your queue from blowing up.