MVP of celery task routing

[owocki]

Description

Adds the ability to route tasks to different queues, so that marketing tasks (like sending emails) dont get in the way of high priority task queues.

Refers/Fixes

#circle-engineering

https://docs.celeryproject.org/en/stable/userguide/routing.html

Testing

run with

celery worker --app=taskapp --queues=<QUEUE_NAME>

[owocki]

there are other ways of probably tuning celery too! @androolloyd let me know if theres a better way of ofrmalizing this

[codecov]

Codecov Report

Merging #7528 into stable will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           stable    #7528   +/-   ##
=======================================
  Coverage   26.00%   26.01%           
=======================================
  Files         309      309           
  Lines       31198    31201    +3     
  Branches     4619     4620    +1     
=======================================
+ Hits         8114     8117    +3     
+ Misses      22805    22800    -5     
- Partials      279      284    +5     

Impacted Files	Coverage Δ
app/app/settings.py	80.97% <100.00%> (+0.05%)	⬆️
app/taskapp/celery.py	94.11% <100.00%> (+0.78%)	⬆️
app/quests/views.py	16.22% <0.00%> (ø)
app/dashboard/views.py	10.46% <0.00%> (ø)
...rketing/management/commands/no_applicants_email.py	0.00% <0.00%> (ø)
...eting/management/commands/assemble_leaderboards.py	39.73% <0.00%> (ø)

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[owocki]

ok added routing support to /home/ubuntu/celery/config on both servbers!