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/jwt/exceptions.py

@@ -0,0 +1,82 @@
+class PyJWTError(Exception):
+    """
+    Base class for all exceptions
+    """
+
+    pass
+
+
+class InvalidTokenError(PyJWTError):
+    pass
+
+
+class DecodeError(InvalidTokenError):
+    pass
+
+
+class InvalidSignatureError(DecodeError):
+    pass
+
+
+class ExpiredSignatureError(InvalidTokenError):
+    pass
+
+
+class InvalidAudienceError(InvalidTokenError):
+    pass
+
+
+class InvalidIssuerError(InvalidTokenError):
+    pass
+
+
+class InvalidIssuedAtError(InvalidTokenError):
+    pass
+
+
+class ImmatureSignatureError(InvalidTokenError):
+    pass
+
+
+class InvalidKeyError(PyJWTError):
+    pass
+
+
+class InvalidAlgorithmError(InvalidTokenError):
+    pass
+
+
+class MissingRequiredClaimError(InvalidTokenError):
+    def __init__(self, claim: str) -> None:
+        self.claim = claim
+
+    def __str__(self) -> str:
+        return f'Token is missing the "{self.claim}" claim'
+
+
+class PyJWKError(PyJWTError):
+    pass
+
+
+class MissingCryptographyError(PyJWKError):
+    pass
+
+
+class PyJWKSetError(PyJWTError):
+    pass
+
+
+class PyJWKClientError(PyJWTError):
+    pass
+
+
+class PyJWKClientConnectionError(PyJWKClientError):
+    pass
+
+
+class InvalidSubjectError(InvalidTokenError):
+    pass
+
+
+class InvalidJTIError(InvalidTokenError):
+    pass