support setting fastretrieval / 支持设置 fastretrieval

[0x5459]

Droplet / 水滴

• droplet
• droplet-client
• 文档 / docs

Description / 描述

If fastretrieval = false, delete the piece file after sealing is completed. When the user retrieves it, it triggers the unsealing process. / 如果 fastretrieval = false，密封完成后删除 piece 文件， 用户检索时，并触发 unseal 流程。