Feature request: ability to backup face scoring models

[ChrisFab16]

The most time-demanding task in getting the full benefit from the solution is categorizing and tagging all the faces.

Right now, there is no way to back up the training data, meaning for a new installation a user has to re-create all that training data.

suggestion is therefore to provide a mechanism to export the training data for each person together with the pertinent data (name, potential social graph relationships) in something like safetensor format combined with csv.