pub const DUP_CACHE_TTL_MS: u64 = _; // 3_600_000u64Expand description
How long a duplicate key stays suppressed.
Capacity alone is not an expiry policy. A packet whose identity is derived from its contents rather than a MIC — a beacon, whose body is empty and whose non-dynamic options never change — hashes to the same key on every repetition, so a quiet mesh that never pushes 64 further keys through the ring would suppress that node’s beacons forever. An hour is long enough that a burst of retransmissions of one packet is still collapsed, and short enough that a node re-announcing itself is heard again well within the time anyone would wait for it.