Add PixelJury SOTA assessment

[gchahal1982]

Summary

• add an evidence-based PixelJury SOTA assessment with frozen eligibility rules
• include reproducible PixelJury criterion ratings, explicit critical gates, competitor evidence, gaps, and implementation roadmap
• correct unsupported integration cells and package-download attribution found during independent review

Testing

• npm test — 20/20 passed
• npm audit --audit-level=high — 0 vulnerabilities
• dossier schema/evidence validation — passed

An earlier testing subagent was attempted but failed with An internal error occurred. Please try again. If this issue persists, please contact support. The local replacement validation above completed successfully. Hosted competitor internals and commercial efficacy remain unverified as labeled.