{"execution_id":"09b117d5-a586-403a-8916-b4e727761ccc","status":"failed","config_path":"pipelines/inline/09b117d5-a586-403a-8916-b4e727761ccc.yaml","started_at":"2026-04-21T17:33:24.749535","completed_at":"2026-04-21T17:35:45.200870","duration_seconds":140.451335,"results":{"steps":[{"result":{"result":{"reason":"Dataset already exists","skipped":true,"generated":false,"output_dir":"/app/datasets/exp_best_islands_btc_60_ema20return_20260403"},"status":"completed","streaming":true,"execution_id":"55a11a54-2490-42f2-9687-cee1645adac9","service_execution_id":"55a11a54-2490-42f2-9687-cee1645adac9","pipeline_execution_id":"09b117d5-a586-403a-8916-b4e727761ccc"},"status":"success","step_name":"01_dataset","step_type":"dataset","started_at_iso":"2026-04-21T17:33:26.911471","duration_seconds":0.138305},{"error":"Optuna optimization failed: Optimization failed: Stage 2 survivor guardrail failed: approved_survivors=0; minimum_survivors_required_to_continue=5; requested_finalists_top_k=5; strict_pareto_candidates=0; expanded_candidates=0; total_eligible_completed_trials=0; candidates_evaluated=0; candidate_source=no_eligible_completed_trials; fallback_used=False; candidate_contract_satisfied=False; rejected_reason_counts={}","status":"failed","step_name":"02_tuning","step_type":"tuning","started_at_iso":"2026-04-21T17:33:28.958336"}],"started_at":"2026-04-21T17:33:26.042022","completed_at":"2026-04-21T17:35:43.472518","pipeline_name":"aaaaaaa","total_duration_seconds":0.138305},"error":"Pipeline failed: 1 step(s) failed: 02_tuning"}