* test(#4183): reproduce root phase Fallow base failure * fix(#4183): resolve root phase Fallow base Fall back to the phase root commit when its parent is unresolvable. * chore(#4183): add release note * chore(#4183): bind changeset to fork PR * docs(#4183): describe root fallback precisely * chore(#4183): bind changeset to upstream PR --------- Co-authored-by: CI Rebase Check <ci@gsd-redux> Co-authored-by: Tom Boucher <trekkie@nomorestars.com>