feat: Add enterprise signal for learner credit fulfillment revokation

[pwnage101]

ENT-9213

[adamstankiewicz]

Looks good to me, with a couple docs-related nits and a sanity check type question.

[pwnage101]

@mariajgrimaldi please take a look when you have a chance!

[iloveagent57]

@pwnage101 it'll probably be useful for Maria or others in the community to paste in some context from ENT-9213 (which they won't be able to access). Also maybe add links to the edx-enterprise models that this new signal-data correspond to.

[pwnage101]

Fair, so first here's the ticket body for ENT-9213:

Background

There is an enterprise-subsidy cron job that writes reversals from recently unenrolled records to get transactions into a reversed state (at which point we'll send an event that causes the corresponding assignment to be reversed). We should eliminate that cron/mgmt command and replace it with an event producer/consumer.

AC

• Add a new event for enterprise unenrollment events LearnerCreditEnterpriseCourseEnrollment
  • In particular, we want to know when an EnterpriseCourseEnrollment becomes unenrolled, and then send data about that enrollment and its related fulfillment record onto the event bus.
  • Ensure transaction ID is in the message
  • https://github.com/openedx/edx-enterprise/blob/d7e67a82fad599509ecd06a5ef7b52bbc8e3fe29/enterprise/models.py#L2325C7-L2325C46
• enterprise-subsidy consumes these events in real time and writes reversal for that one learner.
  • Ensure that enterprise-subsidy has appropriate roles, ACLs, API keys etc. to be a consumer of openedx events.

[pwnage101]

Here's a list of all other openedx PRs which are all part of this same ticket:

• feat: emit learner credit unenrollment event · openedx/edx-enterprise
• feat: install and enable new LC enrollment revoked event · openedx/edx-platform
• feat: write reversal on LC enrollment revoked event · openedx/enterprise-subsidy

[mariajgrimaldi]

Hi folks! Thank you for your contribution. I'll be reviewing this as soon as I can. Thanks for the patience!

[pwnage101]

FYI, I also updated the docstrings with direct links to django models in openedx code.

[mariajgrimaldi]

A few non-blocking comments. Thanks for the patience!

[pwnage101]

@mariajgrimaldi please merge at your earliest convenience, as I do not have write access to this repository.