- Bidirectional Communication with FIT-Connect Reply Channel (planning#654) - ServiceType Getter on ReceivedSubmission (planning#1072) - ApplicationDate on a SendableSubmission (planning#1243) - Submitted-at (iat) timestamp on the ReceivedSubmission (planning#654) - Configurable HTTP-Client timeouts (planning#1664) - Arbitrary data schema formats for validation from the local filesystem (planning#1196) - New DTOs for submission and reply notification callbacks (planning#1400) - New internal core KeyGenerator to generate X509 test certificates, RSA-KeyPairs and JWKs (planning#664)