[cschanhniem]

Summary

• New module: src/openamp_foundry/evidence/certificate_quality.py
• assess_certificate_quality(cert: dict) computes quality tier for any certificate dict
• Three ordered tiers: draft → internal_review → external_review_ready
• draft: candidate_id, sequence, scores present
• internal_review: draft + selection_reason, known_failure_modes, proof_ladder_level, baseline_caveat, pipeline_version; zero forbidden-claim violations
• external_review_ready: internal_review + recommended_next_steps, references_checked, config_hash; zero warnings
• Returns: quality_tier, missing_fields, claim_violations, warnings, is_external_review_ready
• build_certificate() output from the pipeline reaches external_review_ready by default
• 63 tests: tier constants, full cert is external_review_ready, minimal cert is draft, below_draft detection, claim violations block tier, internal_review tier, edge cases
• BASELINE 6394→6457
• Closes Phase B B5 — external-review readiness is now a computed property, not a reviewer judgment call