#1244 Add Content-Type to JWE Encryption Header

...c/main/java/dev/fitko/fitconnect/api/services/Sender.java

...v/fitko/fitconnect/api/services/crypto/CryptoService.java

...ava/dev/fitko/fitconnect/cli/keygen/JWKGeneratorTest.java

...t/client/sender/strategies/SendNewSubmissionStrategy.java

...st/java/dev/fitko/fitconnect/client/SenderClientTest.java

...ava/dev/fitko/fitconnect/client/SubscriberClientTest.java

...main/java/dev/fitko/fitconnect/core/SubmissionSender.java

...va/dev/fitko/fitconnect/core/crypto/JWECryptoService.java

.../java/dev/fitko/fitconnect/core/SubmissionSenderTest.java

...ev/fitko/fitconnect/core/crypto/JWECryptoServiceTest.java

...fitconnect/core/events/SecurityEventTokenServiceTest.java

...dev/fitko/fitconnect/integrationtests/SenderClientIT.java