[cschanhniem]

Summary

• NegativeResultEntry: 12 fields, atomic NRR- failure record for pipeline rejections
• 10 validation rules: NRR- prefix, 3 non-empty strings, ISO date, 3 controlled-vocab checks (7 stages, 9 reasons, 4 confidences), outcome_summary non-empty and ≤400 chars, notes ≤300 chars
• 4 warnings: provisional+high-confidence, manual_review/reason mismatch, uncertain+final, manual_exclusion without notes
• 63 tests; BASELINE 5477->5540
• CLI: openamp-foundry negative-result-entry-check
• Implements Phase F F1 — NRR- is the foundation that NAS- indexes and FCR- aggregates