fix: increase max_run_time for delayed job

[mroderick]

This hopefully fixes the timeouts that we're seeing in https://app.rollbar.com/a/codebar-production/fix/item/codebar-production/640/occurrence/449286860545#detail

The Heroku scheduler runs the job every 10 minutes, and thus gives us 10 minutes to complete the work. Hopefully we can complete it in 9 minutes.

Ping @mikej @olleolleolle: does it make sense to use 9 minutes timeout, or shall we just let the Heroku scheduler kill the job, hoping it will resume the work in the next iteration?

Also, would it make sense to switch to deliver_later in invite_coaches_to_virtual_workshop?

This replaces #2127

[olleolleolle]

Worth a try!

Edit: to your question, I think that absolutely, async is easier.

[gnclmorais]

If this works, it would be quite useful! Related, have we thought about using Sidekiq instead, like Heroku recommends in its documentation?

[olleolleolle]

If this works, it would be quite useful! Related, have we thought about using Sidekiq instead, like Heroku recommends in its documentation?

We do many things to be as cheap as possible, this being one of them.