Add standalone Reducto stressor review report

[Shchoholiev]

Summary

• Adds one self-contained HTML artifact for reviewing the targeted-prompt Reducto result by stressor.
• Includes the 14-row stressor table, six annotated PDF evidence panels, and complete ground-truth versus Reducto JSON objects.
• Embeds all images and uses internal links only; no external assets or local filesystem paths.

How to review

Download artifacts/reducto-targeted-visual-audit.html from this branch and open it in a browser. Review the verdict table first, then use each View evidence link to inspect the source-page comparison and JSON.

Verification

• 180 repository tests passed.
• Standalone artifact audit passed: 14 rows, six embedded images, internal-only links, no local paths.
• git diff --check passed.