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/chromadb/errors.py

@@ -0,0 +1,194 @@
+from abc import abstractmethod
+from typing import Dict, Optional, Type
+from overrides import overrides, EnforceOverrides
+
+
+class ChromaError(Exception, EnforceOverrides):
+    trace_id: Optional[str] = None
+
+    def code(self) -> int:
+        """Return an appropriate HTTP response code for this error"""
+        return 400  # Bad Request
+
+    def message(self) -> str:
+        return ", ".join(self.args)
+
+    @classmethod
+    @abstractmethod
+    def name(cls) -> str:
+        """Return the error name"""
+        pass
+
+
+class InvalidDimensionException(ChromaError):
+    @classmethod
+    @overrides
+    def name(cls) -> str:
+        return "InvalidDimension"
+
+
+class IDAlreadyExistsError(ChromaError):
+    @overrides
+    def code(self) -> int:
+        return 409  # Conflict
+
+    @classmethod
+    @overrides
+    def name(cls) -> str:
+        return "IDAlreadyExists"
+
+
+class ChromaAuthError(ChromaError):
+    @overrides
+    def code(self) -> int:
+        return 403
+
+    @classmethod
+    @overrides
+    def name(cls) -> str:
+        return "AuthError"
+
+    @overrides
+    def message(self) -> str:
+        return "Forbidden"
+
+
+class DuplicateIDError(ChromaError):
+    @classmethod
+    @overrides
+    def name(cls) -> str:
+        return "DuplicateID"
+
+
+class InvalidArgumentError(ChromaError):
+    @overrides
+    def code(self) -> int:
+        return 400
+
+    @classmethod
+    @overrides
+    def name(cls) -> str:
+        return "InvalidArgument"
+
+
+class InvalidUUIDError(ChromaError):
+    @classmethod
+    @overrides
+    def name(cls) -> str:
+        return "InvalidUUID"
+
+
+class InvalidHTTPVersion(ChromaError):
+    @classmethod
+    @overrides
+    def name(cls) -> str:
+        return "InvalidHTTPVersion"
+
+
+class AuthorizationError(ChromaError):
+    @overrides
+    def code(self) -> int:
+        return 401
+
+    @classmethod
+    @overrides
+    def name(cls) -> str:
+        return "AuthorizationError"
+
+
+class NotFoundError(ChromaError):
+    @overrides
+    def code(self) -> int:
+        return 404
+
+    @classmethod
+    @overrides
+    def name(cls) -> str:
+        return "NotFoundError"
+
+
+class UniqueConstraintError(ChromaError):
+    @overrides
+    def code(self) -> int:
+        return 409
+
+    @classmethod
+    @overrides
+    def name(cls) -> str:
+        return "UniqueConstraintError"
+
+
+class BatchSizeExceededError(ChromaError):
+    @overrides
+    def code(self) -> int:
+        return 413
+
+    @classmethod
+    @overrides
+    def name(cls) -> str:
+        return "BatchSizeExceededError"
+
+
+class VersionMismatchError(ChromaError):
+    @overrides
+    def code(self) -> int:
+        return 500
+
+    @classmethod
+    @overrides
+    def name(cls) -> str:
+        return "VersionMismatchError"
+
+
+class InternalError(ChromaError):
+    @overrides
+    def code(self) -> int:
+        return 500
+
+    @classmethod
+    @overrides
+    def name(cls) -> str:
+        return "InternalError"
+
+
+class RateLimitError(ChromaError):
+    @overrides
+    def code(self) -> int:
+        return 429
+
+    @classmethod
+    @overrides
+    def name(cls) -> str:
+        return "RateLimitError"
+
+
+class QuotaError(ChromaError):
+    @overrides
+    def code(self) -> int:
+        return 400
+
+    @classmethod
+    @overrides
+    def name(cls) -> str:
+        return "QuotaError"
+
+
+error_types: Dict[str, Type[ChromaError]] = {
+    "InvalidDimension": InvalidDimensionException,
+    "InvalidArgumentError": InvalidArgumentError,
+    "IDAlreadyExists": IDAlreadyExistsError,
+    "DuplicateID": DuplicateIDError,
+    "InvalidUUID": InvalidUUIDError,
+    "InvalidHTTPVersion": InvalidHTTPVersion,
+    "AuthorizationError": AuthorizationError,
+    "NotFoundError": NotFoundError,
+    "BatchSizeExceededError": BatchSizeExceededError,
+    "VersionMismatchError": VersionMismatchError,
+    "RateLimitError": RateLimitError,
+    "AuthError": ChromaAuthError,
+    "UniqueConstraintError": UniqueConstraintError,
+    "QuotaError": QuotaError,
+    "InternalError": InternalError,
+    # Catch-all for any other errors
+    "ChromaError": ChromaError,
+}