There's a problem here: id and title are extracted from the root, I suppose. Is there a way to directly specify that id and title belong to rialight.application? Or do I need a dynamic access to skip rialight.application?
Serde will by default follow any nested structure in your statically-typed domain types. If you wrap your ApplicationConfig accordingly, behind the appropriate fields, then the deserializer will look for it under that path. Playground.