feat: 添加模型下载脚本（ModelScope）

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

vsp/qwen3.5-9b/download_model.py

@@ -0,0 +1,31 @@
+"""从 ModelScope 下载 Qwen3.5-9B 模型"""
+import os
+import time
+import argparse
+
+
+def download_model(model_dir="vsp/qwen3.5-9b/model"):
+    """下载模型到指定目录"""
+    from modelscope import snapshot_download
+
+    os.makedirs(model_dir, exist_ok=True)
+    print(f"开始下载 Qwen3.5-9B 到 {model_dir} ...")
+    start = time.time()
+
+    model_path = snapshot_download(
+        "Qwen/Qwen3.5-9B",
+        cache_dir=model_dir,
+    )
+
+    elapsed = time.time() - start
+    print(f"下载完成！耗时: {elapsed:.1f}s")
+    print(f"模型路径: {model_path}")
+    return model_path
+
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser()
+    parser.add_argument("--model-dir", default="vsp/qwen3.5-9b/model",
+                        help="模型保存目录")
+    args = parser.parse_args()
+    download_model(args.model_dir)