* feat: add support for SFTP volume backend
* feat: allow more secure SFTP connection with known hosts
* refactor: make default value for skip host key check to false
* refactor: use os.userInfo when setting uid/gid in mount commands
* refactor(startup): ensure entities always use the latest configuration schema
* refactor: await config updates to avoid race condition on later mount
* refactor: use short ids to allow changing the name of volumes & repos
* refactor: address PR feedbacks
* fix: make short_id non null after initial population