Draft: Remove caseId from `POST /submissions` request
Decision: Follow-up messages (replies) will not be created via the POST /submissions
endpoint but will be created via the POST /replies
endpoint.
(Nevertheless, a caseId will be automatically created and returned when creating a submission. -> https://git.fitko.de/fit-connect/api/-/merge_requests/114 is perfectly fine)
Edited by David Schwarzmann