feat: 密钥管理

internal/errors/errors.go

@@ -31,6 +31,8 @@ var (
 	ErrDatabase            = &APIError{HTTPStatus: http.StatusInternalServerError, Code: "DATABASE_ERROR", Message: "Database operation failed"}
 	ErrUnauthorized        = &APIError{HTTPStatus: http.StatusUnauthorized, Code: "UNAUTHORIZED", Message: "Authentication failed"}
 	ErrForbidden           = &APIError{HTTPStatus: http.StatusForbidden, Code: "FORBIDDEN", Message: "You do not have permission to access this resource"}
+	ErrTaskInProgress      = &APIError{HTTPStatus: http.StatusConflict, Code: "TASK_IN_PROGRESS", Message: "A task is already in progress"}
+	ErrBadGateway          = &APIError{HTTPStatus: http.StatusBadGateway, Code: "BAD_GATEWAY", Message: "Upstream service error"}
 )
 
 // NewAPIError creates a new APIError with a custom message.