Figure out how to not wait for exports

[stdavis]

Currently, the job waits for each export sequentially. This could be optimized by passing wait=False and then checking the job statuses after kicking off all of the exports. We tried doing this and couldn't get the job status checking to work. It seems like only the first job resolved and the rest of them hung forever.

project-moonwalk/jobs/src/backup/main.py

Line 81 in 5e4602e

wait=True,

[stdavis]

e5c4503 shows that we can wait now. So maybe this is unblocked now? I'm not sure if @steveoh's new knowledge of task queues may inform our decision on where to go from here on this.

[steveoh]

I think task queues would be a great fit