chore: 添加虚拟环境到仓库

- 添加 backend_service/venv 虚拟环境
- 包含所有Python依赖包
- 注意：虚拟环境约393MB，包含12655个文件

backend_service/venv/lib/python3.13/site-packages/dashscope/model.py

@@ -0,0 +1,49 @@
+# Copyright (c) Alibaba, Inc. and its affiliates.
+
+from dashscope.api_entities.dashscope_response import DashScopeAPIResponse
+from dashscope.client.base_api import GetMixin, ListMixin
+
+
+class Model(ListMixin, GetMixin):
+    SUB_PATH = 'models'
+
+    @classmethod
+    def get(cls,
+            name: str,
+            api_key: str = None,
+            workspace: str = None,
+            **kwargs) -> DashScopeAPIResponse:
+        """Get the model information.
+
+        Args:
+            name (str): The model name.
+            api_key (str, optional): The api key. Defaults to None.
+            workspace (str): The dashscope workspace id.
+
+        Returns:
+            DashScopeAPIResponse: The model information.
+        """
+        return super().get(name, api_key, workspace=workspace, **kwargs)
+
+    @classmethod
+    def list(cls,
+             page=1,
+             page_size=10,
+             api_key: str = None,
+             workspace: str = None,
+             **kwargs) -> DashScopeAPIResponse:
+        """List models.
+
+        Args:
+            api_key (str, optional): The api key
+            page (int, optional): Page number. Defaults to 1.
+            page_size (int, optional): Items per page. Defaults to 10.
+
+        Returns:
+            DashScopeAPIResponse: The models.
+        """
+        return super().list(api_key,
+                            page,
+                            page_size,
+                            workspace=workspace,
+                            **kwargs)