CE Events from CAS Matches

[eanders]

Please squash merge this PR

Description

WIP

This corrects some assumptions for canceled and declined matches and how they generate referral events. Specifically, canceled matches were not identifying the reason for CE reporting correctly, and matches that didn't end with a decline, but which were declined, couldn't always find their reasons.

Type of change

• Bug fix

Checklist before requesting review

• I have performed a self-review of my code
• I have run the code that is being changed under ideal conditions, and it doesn't fail
• My code includes comments and/or descriptive variable names to help other engineers understand the intent (or not applicable)
• My code follows the style guidelines of this project (rubocop)
• I have updated the documentation (or not applicable)
• If it's not obvious how to test this change, I have provided testing instructions in this PR or the related issue