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

scratch/check_ws_ticks_source.py

@@ -0,0 +1,19 @@
+from database import TradeDB
+db = TradeDB()
+try:
+    sql = """
+    SELECT 
+        source, COUNT(*) as cnt
+    FROM ws_ticks
+    WHERE DATE(recv_ts) = '2026-08-10'
+    GROUP BY source;
+    """
+    rows = db.conn.execute(sql).fetchall()
+    
+    import json
+    print("\n--- ws_ticks source count Today ---")
+    for r in rows:
+        print(json.dumps(dict(r)))
+        
+finally:
+    db.close()