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The inbound FilterAnnounce FPR cap rejects filters whose false-positive rate (fill^k) exceeds the configured maximum. On the fixed 1 KB / k=5 filter, 0.05 corresponds to fill 0.549 (~1,300 reachable entries), and the busiest nodes' aggregates were beginning to hit that ceiling as the mesh grew. Raise the default to 0.10 (fill 0.631, ~1,630 entries) to restore headroom toward the fixed-filter capacity limit. A saturated or poisoned filter is ~100% FPR and remains rejected, so the antipoison gate is not materially weakened. Updates the config default, the config-reference and bloom-filter design docs, and the changelog.