Allow access to mapped URL from another workspace, so that a frontend project can talk to a backend (API) project.

For instance, https://3000-idx-sermons-nextjs-1723133529534.cluster-hf4yr35cmnbd4vhbxvfvc6cp5q.cloudworkstations.dev/ making requests to https://3001-idx-sermons-backend-1723134362471.cluster-joak5ukfbnbyqspg4tewa33d24.cloudworkstations.dev/api/some-endpoint

This is presumably possible when it's a client-side request since you'll be logged in to Project IDX, but it's not currently possible for server-side requests - the request gets redirected to the OAuth flow.