Build a FHIR EpisodeOfCare resource to model a longitudinal care episode for a patient with a chronic condition, linking it to Encounters and tracking the episode lifecycle

Verified steps

1. Create an EpisodeOfCare resource with status=active, patient reference, managingOrganization, and type coded to the episode category (e.g., home care, palliative care)
2. Add a diagnosis entry referencing the primary Condition driving the episode and set diagnosis.rank=1 for the principal diagnosis
3. Link individual Encounter resources to the EpisodeOfCare by setting Encounter.episodeOfCare to reference the EpisodeOfCare resource ID
4. Search for all Encounters in an episode with GET /Encounter?episode-of-care={id} to retrieve the full encounter history
5. Transition the EpisodeOfCare status through onhold, waitlist, or finished as the patient's care situation changes, recording the period.end when the episode closes