Dogebox Backup

[elusiveshiba]

Phase 1: Configuration only

Ability to backup and restore Dogebox configuration. Data such as Dogecoin Core blocks etc. will need to be re-downloaded after restore.
This phase should also include a feature to import a previous master key.

Backup should include:

• DataDir/dogebox.db (NetworkState, DogeboxState, SourceState).
• DataDir/pups/pup_*.gob (pup runtime state).
• DataDir/pups/*/ source metadata needed to re-fetch pups (Not sure if we should exclude storage directory?).
• /etc/nixos/dogebox system config.

Optional 'Include keys' checkbox adds:

• DataDir/pups/storage/*/delegated.key
• DataDir/pups/storage/*/delegated.extended.key
• any stored SSH keys (Not sure if this is required?)
• DataDir/pups/storage/*/.dbx/config.env

Backup format:
tarball with manifest (JSON) listing included files and a checksum

Restore flow:

• Replace system files with backup files
• Walk user through key regeneration if keys were not included in the backup
• Allow user to provide previous master key

Phase 2: Full Image

Ability to backup and restore the entire Dogebox, including all data, as an image file

Backup should include:

• A full disk image of the Dogebox system using dd/partclone with metadata file (device model, disk size, partition table checksum)

Restore flow:

• Boot into recovery or similar and write image back to disk

[edtubbs]

Would be cool if we could use OP-TEE so backups can store/recover the master key via secure storage too.