Applying a snapshot now also raises the replica's sequence horizon: a
snapshot covers all events up to its captured cutoff. Previously the
horizon only advanced with the live stamp stream, so the server replica
of a player who never painted served snapshots with cutoff 0 - late
joiners then waited forever for the published baseline cutoff and the
reveal gate never opened (third client could not see the second).
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
adminandClaude Fable 5
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