I can see two ways:
Either you have a look at the changelogs:
For example you can have a look at the recent changelogs for shamu builds here: https://images.ecloud.global/nightly/shamu/
Or you have a look at the changes made in the git repositories.
I am not aware of a list that contains the complete list of changes, but it sounds like a good idea, to have such a list for monitoring.