Add network partition, asymmetric partition, and message loss simulation
to the distribution test harness. 15 new behavioral tests covering
split-brain, cascading failure, seed node death, rapid churn, 50-node
clusters, and actor resolution under partition.
Research notes from studying FoundationDB DST, Hashicorp memberlist,
Antithesis, TigerBeetle VOPR, Turmoil/MadSim, and Jepsen nemeses.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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