feat(kv): wire keyviz.Sampler into ShardedCoordinator dispatch path#645

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bootjp merged 3 commits intomainfrom

feat/keyviz-coordinator-wiring

Apr 26, 2026

Commits on Apr 25, 2026

feat(kv): observe dispatched mutations with keyviz Sampler
bootjp
committed

Commits on Apr 26, 2026

keyviz+kv: tighten Sampler nil-safe contract + slim observe doc
bootjp
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keyviz wiring: pin pre-commit observe semantics + match prod routeKey
bootjp
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