prisma-risk / tsoracle / 26411929731

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test(e2e): tolerate a small soak error rate across a rolling restart (#419)

Monotonicity stays the hard, zero-tolerance soak invariant, but a graceful
rolling restart of a consensus cluster has an irreducible window where an
in-flight RPC to a terminating pod is severed (a transport error the client's
retry cannot always mask, fanned out across coalesced waiters). etcd,
CockroachDB, and TiKV tolerate this transient rather than guaranteeing zero
client-visible errors across an election/restart. The soak now passes iff
monotonicity_violations == 0 and the final error rate is below 0.5% (observed
~0.03-0.06% across restarts); cold-start stays strict (errors == 0).

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