docs(rectification): mark v4 intake cases as already seen, not sealed

Keep the four migrated cases in the queue. Record prior score exposures, distinguish migrated review from a fresh biography audit, and reject exposed or auto-attested cases from blind holdout use.

Co-authored-by: Cursor <cursoragent@cursor.com>

scripts/minute_rectification_holdout_validator.py

@@ -19,6 +19,8 @@ ALLOWED_DOMAINS = {
     "education", "relocation", "relationship", "career", "finance", "health_pressure",
 }
 ALLOWED_PRECISIONS = {"year", "month", "day"}
+FRESH_HUMAN_REVIEW_KIND = "fresh_biography_audit"
+MIGRATED_HUMAN_REVIEW_KIND = "migrated_v3_record"
 
 
 def _is_public_url(value: Any) -> bool:
@@ -143,6 +145,13 @@ def _case_errors(case: Any, gate: dict[str, Any]) -> list[str]:
     return errors
 
 
+def _prior_score_exposures(case: Any) -> list[Any]:
+    raw = case.get("prior_score_exposures") if isinstance(case, dict) else None
+    if not isinstance(raw, list):
+        return []
+    return [item for item in raw if item]
+
+
 def _review_safeguard_errors(case: Any, gate: dict[str, Any]) -> list[str]:
     """Validate safeguards required for newly admitted v4 holdout cases."""
     if not isinstance(case, dict):
@@ -150,6 +159,13 @@ def _review_safeguard_errors(case: Any, gate: dict[str, Any]) -> list[str]:
     errors: list[str] = []
     if not isinstance(case.get("adjudicator"), str) or not case.get("adjudicator", "").strip():
         errors.append("missing_independent_adjudicator")
+    if _prior_score_exposures(case):
+        errors.append("results_already_seen_cannot_be_blind_holdout")
+    review_kind = case.get("human_review_kind")
+    if review_kind == MIGRATED_HUMAN_REVIEW_KIND:
+        errors.append("migrated_review_does_not_satisfy_safeguard")
+    if review_kind != FRESH_HUMAN_REVIEW_KIND:
+        errors.append("fresh_biography_audit_not_attested")
     if case.get("independent_human_reviewed") is not True:
         errors.append("independent_review_not_attested")
     if case.get("frozen_before_scoring") is not True: