feat: GoCert 1.0 Handlers

[kayra1]

Description

This change introduces all of the handlers defined in the GoCert spec, and a helpful logging middleware function for the server.

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have made corresponding changes to the documentation
• I have added tests that validate the behaviour of the software
• I validated that new and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules

[kayra1]

The first PR got merged, so I rebased this branch. Should be easier to read now.