Align FHIR versions in PDS FHIR API
The PDS FHIR API (R4) makes direct references to the FHIR ODS (STU3) API. It is not permitted within FHIR to mix versions of FHIR. This should be addressed - presumably by making an R4 version of the ODS API. If so, would be a good opportunity to fix the defects in that API.