Internal operations can now opt for a non-default priority via their AdmissionContext.

This ticket can serve as a placeholder for discussion:
(1) Would it be useful to track all new commits which change an operations default priority?
(2) What is the most practical approach?

The solution could be a simple as "won't do", adding some sort of commit hook/ list which tracks server tickets make operations opt out of default priority, etc.

A manual list could risk becoming stale quick, and as more operations utilize re-prioritisation, maybe we need a formal process.