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/python_socketio-5.14.3.dist-info/METADATA

@@ -0,0 +1,74 @@
+Metadata-Version: 2.4
+Name: python-socketio
+Version: 5.14.3
+Summary: Socket.IO server and client for Python
+Author-email: Miguel Grinberg <miguel.grinberg@gmail.com>
+License: MIT
+Project-URL: Homepage, https://github.com/miguelgrinberg/python-socketio
+Project-URL: Bug Tracker, https://github.com/miguelgrinberg/python-socketio/issues
+Classifier: Environment :: Web Environment
+Classifier: Intended Audience :: Developers
+Classifier: Programming Language :: Python :: 3
+Classifier: Operating System :: OS Independent
+Requires-Python: >=3.8
+Description-Content-Type: text/markdown
+License-File: LICENSE
+Requires-Dist: bidict>=0.21.0
+Requires-Dist: python-engineio>=4.11.0
+Provides-Extra: client
+Requires-Dist: requests>=2.21.0; extra == "client"
+Requires-Dist: websocket-client>=0.54.0; extra == "client"
+Provides-Extra: asyncio-client
+Requires-Dist: aiohttp>=3.4; extra == "asyncio-client"
+Provides-Extra: dev
+Requires-Dist: tox; extra == "dev"
+Provides-Extra: docs
+Requires-Dist: sphinx; extra == "docs"
+Dynamic: license-file
+
+python-socketio
+===============
+
+[![Build status](https://github.com/miguelgrinberg/python-socketio/workflows/build/badge.svg)](https://github.com/miguelgrinberg/python-socketio/actions) [![codecov](https://codecov.io/gh/miguelgrinberg/python-socketio/branch/main/graph/badge.svg)](https://codecov.io/gh/miguelgrinberg/python-socketio)
+
+Python implementation of the `Socket.IO` realtime client and server.
+
+Sponsors
+--------
+
+The following organizations are funding this project:
+
+![Socket.IO](https://images.opencollective.com/socketio/050e5eb/logo/64.png)<br>[Socket.IO](https://socket.io)  | [Add your company here!](https://github.com/sponsors/miguelgrinberg)|
+-|-
+
+Many individual sponsors also support this project through small ongoing contributions. Why not [join them](https://github.com/sponsors/miguelgrinberg)?
+
+Version compatibility
+---------------------
+
+The Socket.IO protocol has been through a number of revisions, and some of these
+introduced backward incompatible changes, which means that the client and the
+server must use compatible versions for everything to work.
+
+If you are using the Python client and server, the easiest way to ensure compatibility
+is to use the same version of this package for the client and the server. If you are
+using this package with a different client or server, then you must ensure the
+versions are compatible.
+
+The version compatibility chart below maps versions of this package to versions
+of the JavaScript reference implementation and the versions of the Socket.IO and
+Engine.IO protocols.
+
+JavaScript Socket.IO version | Socket.IO protocol revision | Engine.IO protocol revision | python-socketio version
+-|-|-|-
+0.9.x | 1, 2 | 1, 2 | Not supported
+1.x and 2.x | 3, 4 | 3 | 4.x
+3.x and 4.x | 5 | 4 | 5.x
+
+Resources
+---------
+
+-  [Documentation](http://python-socketio.readthedocs.io/)
+-  [PyPI](https://pypi.python.org/pypi/python-socketio)
+-  [Change Log](https://github.com/miguelgrinberg/python-socketio/blob/main/CHANGES.md)
+-  Questions? See the [questions](https://stackoverflow.com/questions/tagged/python-socketio) others have asked on Stack Overflow, or [ask](https://stackoverflow.com/questions/ask?tags=python+python-socketio) your own question.