{"timestamp": "2026-01-22T21:10:37.955211", "study_name": "stage_3_arm", "geometry_type": "arm_support", "method": "TPE", "objectives": ["displacement", "mass"], "n_objectives": 2, "design_vars": 3, "trials": 21, "converged": false, "convergence_trial": null, "convergence_ratio": null, "best_value": null, "best_params": null, "notes": ""}