Add /internal API route comments for searchability
What does this MR do and why?
This small, comment only MR aims to make it easier to find /internal
API routes as the routes are not stored in an obvious location, e.g. lib/api/internal/base.rb
where as you would expect the routes to be located in lib/api/internal.rb
.
MR acceptance checklist
Please evaluate this MR against the MR acceptance checklist. It helps you analyze changes to reduce risks in quality, performance, reliability, security, and maintainability.