POST: /$export

System-level export — all resource types the token is scoped for, across all patients. Exportable types: AllergyIntolerance, CarePlan, CareTeam, Condition, Coverage, Device, DiagnosticReport, DocumentReference, Encounter, Goal, Immunization, Location, Medication, MedicationDispense, MedicationRequest, Observation, Organization, Patient, Practitioner, PractitionerRole, Procedure, QuestionnaireResponse, RelatedPerson, ServiceRequest, Specimen. If a requested/available type isn't covered by the token's granted scopes, that type is silently skipped (not a failed request) and a note is written to the error file in the completion manifest instead. Only _outputFormat, _since, and _type are supported — sending any other Bulk Data IG parameter (_until, _elements, patient, includeAssociatedData, _typeFilter, organizeOutputBy, allowPartialManifests) fails the request. Parameters are sent as query params on the POST, not as a FHIR Parameters resource body.