We previously were mashing foo.bar into a single SolidHandle; this changes that logic to build up the stack of solid handles for foo and bar that get_solid expects
let's create a deeply nested composite with a bit of fan out to exercise this more. would be nice to have a little utility that does this easily.
let's create task about creating a properly structured graphql response so that client's don't have to this parsing. leave a comment here with issue # so we can grep for it