feat: MLFilter falls back to models/ root if symbol-specific dir not found

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/bot.py

@@ -1,5 +1,6 @@
 import asyncio
 from collections import deque
+from pathlib import Path
 import pandas as pd
 from loguru import logger
 from src.config import Config
@@ -20,7 +21,19 @@ class TradingBot:
         self.exchange = BinanceFuturesClient(config, symbol=self.symbol)
         self.notifier = DiscordNotifier(config.discord_webhook_url)
         self.risk = risk or RiskManager(config)
-        self.ml_filter = MLFilter(threshold=config.ml_threshold)
+        # 심볼별 모델 디렉토리. 없으면 기존 models/ 루트로 폴백
+        symbol_model_dir = Path(f"models/{self.symbol.lower()}")
+        if symbol_model_dir.exists():
+            onnx_path = str(symbol_model_dir / "mlx_filter.weights.onnx")
+            lgbm_path = str(symbol_model_dir / "lgbm_filter.pkl")
+        else:
+            onnx_path = "models/mlx_filter.weights.onnx"
+            lgbm_path = "models/lgbm_filter.pkl"
+        self.ml_filter = MLFilter(
+            onnx_path=onnx_path,
+            lgbm_path=lgbm_path,
+            threshold=config.ml_threshold,
+        )
         self.current_trade_side: str | None = None  # "LONG" | "SHORT"
         self._entry_price: float | None = None
         self._entry_quantity: float | None = None