improve endpoint support

[drbh]

small PR to add a new interface endpoint behind a feature

[Narsil]

Have you checked if the openapi is correctly created ? I think you forgot to add the structs to the utopia thing to generate them properly, no ?

[OlivierDehaene]

This PR does not compile.

[OlivierDehaene]

This should be:

// Define VertextApiDoc conditionally only if the "google" feature is enabled
    let doc = {
        // avoid `mut` if possible
        #[cfg(feature = "google")]
        {
            use crate::VertexInstance;

            #[derive(OpenApi)]
            #[openapi(
            paths(vertex_compatibility),
            components(schemas(VertexInstance, VertexRequest, VertexResponse))
            )]
            struct VertextApiDoc;

            // limiting mutability to the smallest scope necessary
            let mut doc = ApiDoc::openapi();
            doc.merge(VertextApiDoc::openapi());
            doc
        }
        #[cfg(not(feature = "google"))]
        ApiDoc::openapi()
    };