Support mixed queries

[guillochon]

From an e-mailed question:

Right now I can query for all sne Ia, and then loop over those and use the api to query for B band photometry. But it takes entirely too long, and most of the results do not have existing B band photometry.

I have tried something to the likes of:

https://api.astrocats.space/catalog/photometry/claimedtype+time+band+magnitude?claimedtype=ia&band=B

But that does not return the desired results.

The API currently does not support these mixed queries; adding support for this would be useful.