The reprovision retired gitea.westgate.pw in favour of git.westgate.pw, but internal/topdata still defaulted to the old host and made a live API call during the native buildability check, so once CI checkout was fixed the parts tests failed (DNS, then HTTP 404). - defaultGiteaBaseURL -> https://git.westgate.pw; normalize git-ssh. -> git. - Add stubEmptyPartsManifest (stub_test.go) and call it from the 2 non-optional parts tests so they exercise the build offline. Per-test (t.Setenv) on purpose: a global TestMain SOW_ASSETS_SERVER_URL would override the git-remote-derived server other tests configure. VFX tests already pass (optional consumer ignores HTTP 404). make check + make smoke green. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>