resolveValidationRange already knows how to replace a force-push-orphaned
BEFORE_SHA with origin/dev, but the CLI handed it a runner that killed the
process with exit 2 on the first cat-file instead of throwing into
gitObjectExists' catch. Every push after a mandatory issue-branch rebase
therefore painted process-gate red (runs 32939996348, 32940625718,
32942113142). The regression test drives the real CLI in a throwaway repo
with a BEFORE_SHA that no longer exists.
Issue: #315
User-Visible: no
Codex
93054823c3