[Feature] Stash-box gallery fingerprint searching

[slick-daddy]

Is your feature request related to a problem? Please describe.
Galleries lack fingerprints.

Describe the solution you'd like
Stash-box has no gallery fingerprint search API AFAIK. I think it should be added so that scrapers can work better and further implementations can be done to Stash itself.

Describe alternatives you've considered
No other alternatives.

[DogmaDragon]

Galleries doesn't exist on stash-box.

[slick-daddy]

Maybe I should have been more clear. I know they don't exist. What I meant is galleries for stash-box should be implemented if possible and they should have fingerprints so that they can work in parallel with Stash itself. Right now galleries lack feature parity but the gap can be closed. Stash-box has to step in first so that Stash can follow.