Athena had two levels of code deployment: * The core Python libraries and third-party modules, with weekly rolling releases of new/old versions for controlled

Athena had two levels of code deployment: * The core Python libraries and third-party modules, with weekly rolling releases of new/old versions for controlled deployment. These came from internal repos (the AIM system you mention) so that security scanning and licencing was checked. * Application-level code, with Python imports taking source code from a database rather than the filesystem. These are explained in detail in my PyData talk video, linked in my other comment.