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/orjson/__init__.py

@@ -0,0 +1,27 @@
+# SPDX-License-Identifier: (Apache-2.0 OR MIT)
+
+from .orjson import *
+from .orjson import __version__
+
+__all__ = (
+    "__version__",
+    "dumps",
+    "Fragment",
+    "JSONDecodeError",
+    "JSONEncodeError",
+    "loads",
+    "OPT_APPEND_NEWLINE",
+    "OPT_INDENT_2",
+    "OPT_NAIVE_UTC",
+    "OPT_NON_STR_KEYS",
+    "OPT_OMIT_MICROSECONDS",
+    "OPT_PASSTHROUGH_DATACLASS",
+    "OPT_PASSTHROUGH_DATETIME",
+    "OPT_PASSTHROUGH_SUBCLASS",
+    "OPT_SERIALIZE_DATACLASS",
+    "OPT_SERIALIZE_NUMPY",
+    "OPT_SERIALIZE_UUID",
+    "OPT_SORT_KEYS",
+    "OPT_STRICT_INTEGER",
+    "OPT_UTC_Z",
+)

backend_service/venv/lib/python3.13/site-packages/orjson/__init__.pyi

@@ -0,0 +1,32 @@
+import json
+from typing import Any, Callable
+
+__version__: str
+
+def dumps(
+    __obj: Any,
+    default: Callable[[Any], Any] | None = ...,
+    option: int | None = ...,
+) -> bytes: ...
+def loads(__obj: bytes | bytearray | memoryview | str) -> Any: ...
+
+class JSONDecodeError(json.JSONDecodeError): ...
+class JSONEncodeError(TypeError): ...
+
+class Fragment(tuple):
+    contents: bytes | str
+
+OPT_APPEND_NEWLINE: int
+OPT_INDENT_2: int
+OPT_NAIVE_UTC: int
+OPT_NON_STR_KEYS: int
+OPT_OMIT_MICROSECONDS: int
+OPT_PASSTHROUGH_DATACLASS: int
+OPT_PASSTHROUGH_DATETIME: int
+OPT_PASSTHROUGH_SUBCLASS: int
+OPT_SERIALIZE_DATACLASS: int
+OPT_SERIALIZE_NUMPY: int
+OPT_SERIALIZE_UUID: int
+OPT_SORT_KEYS: int
+OPT_STRICT_INTEGER: int
+OPT_UTC_Z: int