Initial provenance check failure

The initial prior worker exited with status 1 because its result correctly stored the core API's abbreviated Git ID, while the original measurement launcher incorrectly required equality with the full 40-character ID. It saved no result or API timing. This incomplete run contributes no successful timing to the comparison. Its whole-process duration, error, exact launcher/schema, input/generation files and complete source capsules/manifests are retained.

The corrected launcher reads and verifies both actual Git forms before solving, then checks the result's unchanged abbreviated provenance. Eight regression cases exercise accepted abbreviations and wrong/missing source identities. Both variants' complete core source manifests are byte-identical between this failed cohort and the final six-run cohort. The input is also byte-identical. The correction changes measurement/provenance handling only.