Constant valence::ecs::world::CHECK_TICK_THRESHOLD

pub const CHECK_TICK_THRESHOLD: u32 = 518_400_000; // 518_400_000u32

The (arbitrarily chosen) minimum number of world tick increments between check_tick scans.

Change ticks can only be scanned when systems aren’t running. Thus, if the threshold is N, the maximum is 2 * N - 1 (i.e. the world ticks N - 1 times, then N times).

If no change is older than u32::MAX - (2 * N - 1) following a scan, none of their ages can overflow and cause false positives.