Create data/train.csv

data/train.csv

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+id,site_id,window_days,protocol_signature_hash,motion_artifact_rate,signal_to_noise,plausibility_conflict_rate,rolling_auc,rolling_mae,rolling_mae_delta,calibration_error_shift,coherence_trend,drift_type,predicted_failure_risk,detection_confidence,drift_severity,failure_surface_type,subgroup_affected,intervention_route,recalibration_needed,protocol_reset_plan,escalation_priority,confidence_score,notes,constraints,gold_checklist
+CFSR-001,"SITE-UK-01",30,"sigA1",0.05,0.88,0.04,0.92,0.05,0.00,0.00,"stable","none",0.08,0.88,"low","none","none","continue","no","none","none",0.90,"baseline","<=320 words","surface+route+reset+priority+confidence"
+CFSR-002,"SITE-EU-03",30,"sigC2",0.14,0.75,0.10,0.87,0.08,0.03,0.03,"down","protocol-drift",0.52,0.80,"medium","protocol-drift-surface","broad","tighten-qa-and-monitor","yes","restore kernel + slice thickness","medium",0.84,"early intervention","<=320 words","surface+route+reset+priority+confidence"
+CFSR-003,"SITE-EU-03",30,"sigC2",0.16,0.72,0.14,0.84,0.10,0.05,0.05,"down-fast","silent-accuracy-decay",0.70,0.82,"high","silent-decay-surface","broad","restrict-use-to-low-risk-cases","yes","freeze protocol; vendor audit","high",0.83,"prevent audit failure","<=320 words","surface+route+reset+priority+confidence"
+CFSR-004,"SITE-US-12",30,"sigB9",0.16,0.72,0.18,0.83,0.09,0.04,0.06,"down-fast","quality-driven-collapse",0.76,0.78,"high","quality-collapse-surface","motion+low-snr","rescan-or-block-output","yes","motion control + HR management bundle","critical",0.81,"block unsafe outputs","<=320 words","surface+route+reset+priority+confidence"
+CFSR-005,"SITE-APAC-11",30,"sigD5",0.18,0.70,0.20,0.80,0.11,0.06,0.07,"down-fast","protocol-outside-envelope",0.82,0.80,"critical","outside-envelope-surface","broad","disable-model-at-site","yes","protocol rollback to validated envelope","critical",0.86,"stop deployment","<=320 words","surface+route+reset+priority+confidence"
+CFSR-006,"SITE-US-07",30,"sigB3",0.09,0.82,0.09,0.88,0.06,0.01,0.02,"slight-down","minor-protocol-shift",0.22,0.82,"low","minor-shift-surface","broad","tighten-qa-thresholds","no","none","low",0.86,"small drift","<=320 words","surface+route+reset+priority+confidence"