Handle Verification Failure

A failed verification is useful information.

Recipe

1. Preserve the failed result.
2. Identify the reported mismatch.
3. Confirm the expected evidence.
4. Check for missing or changed inputs.
5. Correct the source or artifact if appropriate.
6. Generate a new artifact.
7. Run verification again.

Do not overwrite the meaning of the original failed result.

A later successful verification is a new result.