Integrating GitLab CI with GitLab to enable distributed builds

This post introduces the integration of GitLab CI with GitLab, enabling single sign-on, project visibility, and simplified setup. It details the architectural decision to separate GitLab and GitLab CI using the public API for independent development and security. The post also introduces the concept of coordinators and runners for distributed builds, emphasizing the importance of running tests on separate machines from source code storage and binding runners to specific projects for exclusivity.