FHIR Appointment returns internal only (non-patient) calendar events

[robertjustjones]

The FHIR Appointment /fhir/Appointment endpoint erroneously includes "In Office" and "Lunch" appointments that should not e included from a FHIR perspective.

A combination of those events could be output as Slots for available appointments, but that is not considered here.

For the present, FHIR Appointments should be filtered to only those that include a patient.