Modify code to Support integrations

[bmarsh9]

We want to be able to support integrations in Gapps so that we can check for controls automatically. Currently Gapps uses self attestation (the user gathers and inputs the evidence) however the end goal is added automatic evidence collection.

This issue will cover the following:

• Modify code and architecture to support integrations (may be Redis)
• Document how to add new integrations

Requirements:

• Integrations must be scoped to the projects
• Must be extensible (users can upload their own integrations) with python code

[bmarsh9]

Ive used python-rq before and really like it: https://devcenter.heroku.com/articles/python-rq

[bmarsh9]

Decided to use https://procrastinate.readthedocs.io/en/stable/ for this.

Version 3.1.2 supports this now. Will create more tickets for documentation and how to add integrations