Summary

#6369 tracks the user who created the build (either manual trigger or rerun) and also tweaked the api/v1/user endpoint to contain a new display_user_id field. The new field should be used to show the user in the top bar, since it reflects the same value that Concourse tracks as the build creator.

We should be able to replace [this function](https://github.com/concourse/concour

As a user of kind-on-c
I want to understand how the thing is tested and how changes are promoted
So that I understand how to consume it and can assess if I can trust it

There are some docs in [ci/README.md][ciR] about how changes make it in, are tested, and promoted. This is however outdated (still talks about alpine & tags).
Also, the [Dockerfile][d] still has some reference to al