Function gated_release_row

pub fn gated_release_row(
    fight: &ActiveFight,
    released_id: Uuid,
    entrance_offset: i64,
) -> i64

Row for a death-gated mob at RELEASE time: the least-occupied row of its own column, counting living enemies standing on it, running to it, or parked pending arrival at the same park column (exit-cooldown waiters and same-tick earlier releases — their park y IS their landing row). Ties prefer the mob’s authored row, then the middle — so the freed space is taken instead of stacking onto survivors.