- This is the first epic to track changes explicitly of attributes in GitLab. - This first epic will focus on milestones. - We will track milestone changes on issues and merge requests explicitly in the system, and consequently, also refactor our system notes and notifications accordingly. - We need to send this information to the production data warehouse, so that GitLabbers can do data analysis. https://gitlab.com/meltano/meltano/issues/171 - We should expose this to the API as well.