Third frame in the burst, per prod TurnEnd -> Judge pairing observed in battle-traffic_tk2_regular.ndjson (positions 10->11, 17->18, etc.). The client's TurnEndOperation sends its own Judge and gates the next turn on a server-pushed Judge via JudgeOperation -> ControlTurnStartPlayer. Closes the v1.1 'Opponent's turn... forever' hang caught during smoke.