fix(sys/services/restic): Include a db dump of PostgreSQL

Including this dump should remove the risk of a backup with a corrupt
PostgreSQL database. Initial test showed that the backup takes
around 32 GB and runs in under 3 hours.

There is one big oversight not yet included in this commit:
All services running a SQLite database are not included in this dump and
thus can not be safely recovered.
At present these are:
- etebase-server (db.sqlite3)
- murmur (murmur.sqlite)

(This is list was generated with `sudo fd sqlite /srv/`)

0 files changed, 0 insertions, 0 deletions