[cschanhniem]

Implements R4 from NEXT_100_PR_MAP.

What

• src/openamp_foundry/evidence/scientific_review_readiness_gate.py: SRG- schema; ScientificReviewReadinessGate dataclass (15 fields); validate_scientific_review_readiness_gate(); build_scientific_review_readiness_gate() (enforces dry_lab_only=True); format_scientific_review_readiness_gate()
• REQUIRED_SRG_ARTIFACT_TYPES (4): CFC, FNR, ATR, PQG
• VALID_READINESS_VERDICTS (4): ready_for_external_review, not_ready, conditionally_ready, review_blocked_by_safety
• VALID_SAFETY_FLAG_TYPES (6): unresolved_hemolysis, unresolved_toxicity, dual_use_concern, off_target_risk, contamination_suspected, no_flags
• VALID_REVIEW_SCOPE_TYPES (4): internal_only, trusted_partner, open_preprint, peer_review_submission
• tests/evidence/test_scientific_review_readiness_gate.py: 63 tests in 5 classes
• BASELINE: 9089 → 9152

Disconfirming pass

• dry_lab_only=False blocked (tested)
• TOY- family ID blocked (tested)
• review_blocked_by_safety requires real flag (not 'no_flags') (tested)
• ready_for_external_review blocks safety flags (tested)
• ready_for_external_review blocks failed_gates (tested)
• ready_for_external_review requires n_confirmed_hits >= 1 (tested)
• no_flags cannot coexist with other flags (tested)
• open_preprint/peer_review blocked when not_ready or review_blocked_by_safety (tested)