Binary resources should be encoded if necessary

[AnalogJ]

Certain providers will return RAW PDF's and other binary data formats, rather than encoding them as json.

When the response content-type is non-json, or application/fhir+json or application/json+fhir, we should correctly base64 encode the data, and store it in the DB.

eg.

https://fhir.nextgen.com/nge/prod/fhir-api-r4/fhir/R4/document/pdf-8f586c49-958c-439f-aa85-4a19017d1e64

http://localhost:9090/api/unsafe/testuser1/fef3ebbe-0710-4650-8b05-d6106e012d18/document/pdf-8f586c49-958c-439f-aa85-4a19017d1e64

Request: GET /nge/prod/fhir-api-r4/fhir/r4/document/pdf-8f586c49-958c-439f-aa85-4a19017d1e64 HTTP/1.1
Host: fhir.nextgen.com
Accept: application/json+fhir
  type=web

Response: HTTP/2.0 200 OK
Alt-Svc: h3=":443"; ma=86400
Api-Version: 5.0.1.121
Cache-Control: no-store
Content-Disposition: attachment; filename=8f586c49-958c-439f-aa85-4a19017d1e64.pdf; filename*=UTF-8''8f586c49-958c-439f-aa85-4a19017d1e64.pdf
Content-Type: application/pdf
Date: Wed, 16 Aug 2023 22:27:54 GMT
Server: CloudFront