Author: Michael Lynch <git@mtlynch.io>
Migrate Go module to GitLab v3 Move ScreenJournal's public repository references and Go module path from github.com/mtlynch/screenjournal/v2 to gitlab.com/mtlynch/screenjournal/v3. This is a breaking import-path change for downstream Go consumers. Validation: dev-scripts/build-all-flake-targets