Twinkle Notes (currently in beta) is close to what you just described. It has a local encrypted sqlite3 database. You need a host (paid) to sync across devices,

Twinkle Notes (currently in beta) is close to what you just described. It has a local encrypted sqlite3 database. You need a host (paid) to sync across devices, otherwise it's free to use on any device: https://twinkle.app https://twinkle.app Please reach to us at support@twinkle.app if you need a free token to try syncing.