Bound gossip_signatures with FIFO eviction to prevent unbounded growth#290

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pablodeymo wants to merge 3 commits intomainfrom

fix-gossip-signatures-unbounded-growth

Commits on Apr 15, 2026

Bound gossip_signatures with FIFO eviction to prevent unbounded memory growth
pablodeymo
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Commits on Apr 16, 2026

Switch gossip signature dedup from first-write-wins to last-write-wins
pablodeymo
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Combine contains_key + insert into a single BTreeMap::insert call
pablodeymo
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