Variable: APPOINTMENT_TYPE_VALUE_MAP
constAPPOINTMENT_TYPE_VALUE_MAP:CodedValueMap
SCH-8 Appointment Type - IG ConceptMap/table-hl70277-to-v2-0277. A single identity group
of the three v2-0277 codes (Normal, Tentative, Complete → themselves, each equivalent,
source and target both v2-0277). Any other code is unmapped → raw coding preserved + flagged.