Fluent JUnit 5 test helpers over opentmf-mockserver: starts an in-process MockServer, registers Dynamic* TMF callbacks, mints JWTs against the built-in Keycloak mock, and redirects Spring api-clients and JWKS URLs at the mock. JUnit and Spring types are on provided/optional scope so the module works for plain-JUnit and Spring consumers alike without dragging Spring into non-Spring builds.