fix(async): offload file metadata checks

app/agent/tools/impl/scrape_metadata.py

@@ -26,6 +26,12 @@ from app.domain.media import normalize_music_type
 from ._music_utils import simplify_music_info
 
 
+def _inspect_local_path(path: Path) -> tuple[bool, bool]:
+    """返回本地路径是否存在及是否为目录。"""
+    exists = path.exists()
+    return exists and path.is_dir(), exists
+
+
 class ScrapeMetadataInput(BaseModel):
     """刮削媒体元数据工具的输入参数模型"""
 
@@ -151,7 +157,14 @@ class ScrapeMetadataTool(MoviePilotTool):
             media_id = normalized_media_id or None
 
             local_path = Path(path)
-            is_local_directory = (storage or "local") == "local" and local_path.is_dir()
+            is_local_directory = False
+            path_exists = True
+            if (storage or "local") == "local":
+                is_local_directory, path_exists = await self.run_blocking(
+                    "storage",
+                    _inspect_local_path,
+                    local_path,
+                )
             file_type = "dir" if is_local_directory or not local_path.suffix else "file"
             fileitem = FileItem(
                 storage=storage or "local",
@@ -161,7 +174,7 @@ class ScrapeMetadataTool(MoviePilotTool):
 
             # 检查本地存储路径是否存在
             if storage == "local":
-                if not Path(path).exists():
+                if not path_exists:
                     return json.dumps(
                         {"success": False, "message": f"刮削路径不存在: {path}"},
                         ensure_ascii=False,