Merge commit '5c16039adfe3da2d9438b8814734f5c8d2570ad3' into kraken * commit '5c16039adfe3da2d9438b8814734f5c8d2570ad3': docs: revise and add documentation for backup APIs
Merge commit '5c16039adfe3da2d9438b8814734f5c8d2570ad3' into kraken * commit '5c16039adfe3da2d9438b8814734f5c8d2570ad3': docs: revise and add documentation for backup APIs