Return an Error on Incorrect Content-Type for Search Requests

[marc-ajs]

Posting a query as payload with a incorrect content-type header, the result is a 200 OK.
Instead of a 415 Unsupported Media Type message, all resources of the searched type are displayed.

The used (faulty) curl request looked like this:

curl --location --request POST 'http://localhost:8080/fhir/Condition/_search' \
  --header 'Accept-Encoding: CSQ' \
  --header 'Content-Type: codex/json' \
  --header 'Prefer: handling=strict' \
  --data-raw '{
    "code": "119206002"
  }'

Blaze works fine when using the correct headers and payload format:

curl --location --request POST 'http://localhost:8080/fhir/Condition/_search' \
  --header 'Accept-Encoding: CSQ' \
  --header 'Content-Type: application/x-www-form-urlencoded' \
  --header 'Prefer: handling=strict' \
  --data-raw 'code=119206002'