POST /api/co-therapy-sessions

POST /api/co-therapy-sessions

{
  "patientId": "pat_abc",
  "providers": ["prv_xyz"],
  "scheduledStart": "2026-05-28T15:00:00Z",
  "scheduledDurationMinutes": 50,
  "videoPlatform": "telehealth",
  "recordingEnabled": true,
  "deploymentId": "dep_abc",
  "publishedWorkflowId": "wf_published_..."
}

POST /api/co-therapy-sessions/{id}/start       # send invitations
POST /api/co-therapy-sessions/{id}/join        # record participant join
POST /api/co-therapy-sessions/{id}/leave       # record participant leave
POST /api/co-therapy-sessions/{id}/transition  # state transition