Required fields in Count and Stats Objects

[duckontheweb]

In the Count Object, it seems like both the name and count fields should be required, but they are not marked as such in their descriptions or in the JSON schema. Likewise for the name and value fields in the Stats Object.

Should we update the descriptions and JSON schema with these requirements, or is there a reason why they are not required?

[duckontheweb]

I forgot that LabelOverview.property_key wouldn't be relevant to raster labels. I've removed that from the list above.