feat: update device handling in YOLO model initialization for improved compatibility

mineru/model/mfd/yolo_v8.py

@@ -1,5 +1,7 @@
 import os
 from typing import List, Union
+
+import torch
 from tqdm import tqdm
 from ultralytics import YOLO
 import numpy as np
@@ -18,8 +20,8 @@ class YOLOv8MFDModel:
         conf: float = 0.25,
         iou: float = 0.45,
     ):
-        self.model = YOLO(weight).to(device)
-        self.device = device
+        self.device = torch.device(device)
+        self.model = YOLO(weight).to(self.device)
         self.imgsz = imgsz
         self.conf = conf
         self.iou = iou