Take a snapshot of the history database first, then back up everything in `/var/lib/homeassistant`.
Vaultwarden data are stored in a different location since the migration to Podman.
This commit configures *bw0.pyrocufflink.blue* as a BURP client, so that the Bitwarden data can be backed up. A pre-backup script is used to take a consistent snapshot of the SQLite database before copying it to the BURP server.
