test: normalize the seed's position on the bucket grid - #15
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The equivalence tests derive their request pair from the wall clock, and when (now - 24h) sat within seconds of a grid edge the bucket and raw paths could legitimately disagree on the point count for reasons belonging to no product bug. Seeding now waits for a phase where the whole pair is confined inside one grid cell; 30 repetitions of all four equivalence tests are clean.
This was referenced Sep 18, 2026
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Follow-up to #14, which merged at
b30ece1seconds before this commit landed on the branch.The equivalence tests derive their request pair from the wall clock; when
(now - 24h)sits within seconds of a 15-minute grid edge, the bucket and raw paths can legitimately disagree on the point count for reasons belonging to no product bug (the same phase-dependent flake CI caught on #14 earlier today). Seeding now waits for a phase where the whole pair is confined inside one grid cell.Gate evidence: 30 repetitions of all four equivalence tests clean locally (
-count=30), including runs across two grid edges.