Mokksy Handler
Minimal contract for embedding Mokksy stub handling into a Ktor application.
Application.mokksy and Route.mokksy accept any MokksyHandler, so stub routing can be mounted into an existing Ktor application without constructing a full MokksyServer (which also allocates an embedded server).
MokksyServer is the standard implementation. Implement this interface directly only when you need a custom stub-registry configuration without an embedded server.