t2 turn 33 -> 34 at +13.113s
{
  "boundary": "2026-09-23T20:00:00+02:00",
  "turn_before": 33,
  "t1_first_not_200_s": null,
  "t2_turn_moved_s": 13.113,
  "resolution_s": 1.0,
  "note": "t2 is bracketed by the poll interval: the true moment lies between this reading and the one before it."
}