Create data/train.csv

data/train.csv

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+id,reactor_class,blanket_type,breeder_material,operating_hours,neutron_flux_1e14_cm2s,spectrum_hardness_index,breeder_lithium_inventory_frac,local_depletion_gradient,helium_production_appm,tritium_generated_g_day,tritium_extracted_g_day,extraction_efficiency,baseline_tbr,observed_tbr,drift_gradient,decoherence_score,decoupling_flag,primary_decoupling_mode,notes
+TBRD-001,Tokamak,HCPB,Li4SiO4,1400,4.9,0.43,0.93,0.07,130,140,114,0.81,1.11,1.10,0.02,0.08,0,"none","Stable"
+TBRD-002,Tokamak,HCPB,Li2TiO3,1700,5.2,0.46,0.91,0.09,150,145,115,0.79,1.09,1.07,0.03,0.10,0,"none","Expected drift"
+TBRD-003,Tokamak,HCLL,LiPb,2100,5.8,0.52,0.89,0.11,175,152,116,0.76,1.06,1.03,0.05,0.14,0,"transport_delay","Small lag"
+TBRD-004,Tokamak,HCLL,LiPb,2500,6.2,0.57,0.86,0.14,205,150,108,0.72,1.03,0.99,0.09,0.22,1,"extraction_drop","Extraction falling"
+TBRD-005,Tokamak,HCPB,Li2TiO3,2800,6.5,0.61,0.83,0.17,240,146,97,0.66,1.00,0.95,0.12,0.30,1,"inventory_trap","Tritium trapped"
+TBRD-006,Stellarator,HCPB,Li4SiO4,1500,4.7,0.41,0.94,0.06,120,138,113,0.82,1.12,1.11,0.02,0.07,0,"none","Stable"
+TBRD-007,Stellarator,HCLL,LiPb,2300,5.6,0.51,0.88,0.12,180,148,112,0.76,1.06,1.02,0.06,0.16,0,"transport_delay","Manageable lag"
+TBRD-008,Tokamak,HCPB,Li4SiO4,3100,6.9,0.66,0.79,0.20,285,142,90,0.63,0.97,0.91,0.16,0.38,1,"extraction_drop","Near threshold"
+TBRD-009,Tokamak,HCLL,LiPb,3300,7.1,0.69,0.77,0.22,310,140,84,0.60,0.95,0.88,0.18,0.42,1,"mixed","Multiple breaks"
+TBRD-010,Stellarator,HCPB,Li2TiO3,2600,5.9,0.56,0.85,0.15,210,147,103,0.70,1.03,0.99,0.08,0.20,0,"none","Stable boundary"