DigitalObject that should be HMO

[julsraemy]

A lot of DigitalObject resources that come from the SGV_10 Familie Kreis shouldn't be HMO, such as https://raw.githubusercontent.com/tgra/Linked-Art-Collection-Data-Workflow/main/digitalobject/data/c_linked_art/1.json.

I wonder if the rules should be amended for PIA: HumanMadeObject as the default for images and if it is a negative photograph, then it is treated as a DigitalObject.