* Fix fork-skip guards for local test runs
The fork skip read GITHUB_REPOSITORY with an upstream fallback, so local runs on a fork always ran the upstream-only guards. Share one helper that checks the origin remote when the variable is unset. Fixes#496.
* test: accept the ssh:// origin form in the upstream-checkout helper
An upstream clone whose origin is ssh://git@github.com/MadsLorentzen/ai-job-search(.git)
must keep running the placeholder guards; the helper only knew the https and
scp-style forms. Folded in at maintainer rebase per the #524 review.
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
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Co-authored-by: Omarinho12345 <omarottelli720@gmail.com>
Co-authored-by: Claude Fable 5.1 <noreply@anthropic.com>
