const CLAIM_WINDOW_MS: i64 = 60_000;Expand description
How long a claim on one event (a session start, a compaction) holds: the
hook and the frontend’s fallback for the same event arrive within
seconds of each other, and one block has no two such events that close.
Not for a fallback that waited behind a turn: a dated claim
(DeliveryState::claim_event) covers that.