curl -X GET "https://your-collabase.ch/api/v1/meetings/series/cm9seri0001?page=1" \
  -H "Authorization: Bearer clb_xYz123ABCD..."

{
  "data": {
    "id": "cm9seri0001",
    "title": "Weekly sync",
    "rrule": "FREQ=WEEKLY;BYDAY=TH",
    "seriesTimezone": "Europe/Zurich",
    "timezone": "Europe/Zurich",
    "instances": [
      { "id": "cm2meet0001abcd", "startsAt": "2026-10-15T08:00:00.000Z", "status": "CLOSED", "isMoved": false },
      { "id": "cm2meet0002efgh", "startsAt": "2026-10-22T08:00:00.000Z", "status": "PLANNED", "isMoved": false }
    ],
    "page": 1,
    "pageCount": 1,
    "manageMeetingId": "cm2meet0002efgh",
    "nextStart": { "date": "2026-10-22", "time": "10:00" }
  }
}

{ "error": { "code": "NOT_FOUND", "message": "Meeting not found" } }