refactor: enhance Optuna backtesting framework, optimize orderbook filtering, and update database management utilities.

scratch/check_accidents.py

@@ -0,0 +1,16 @@
+import json
+
+with open('/home/hoon/.gemini/antigravity-ide/brain/e07d5342-58aa-4443-a5b3-73bde0f593dd/.system_generated/logs/transcript.jsonl', 'r') as f:
+    for line in f:
+        try:
+            data = json.loads(line)
+        except:
+            continue
+        if data.get('step_index') in [5795, 5804, 5805, 5806, 5807, 5808, 5809]:
+            if data.get('type') == 'PLANNER_RESPONSE':
+                for call in data.get('tool_calls', []):
+                    print(f"Step {data.get('step_index')}: {call.get('name')}")
+                    if 'args' in call:
+                        for k, v in call['args'].items():
+                            if k == 'TargetFile':
+                                print(f"  Modified: {v}")