// bucketFor hashes the namespace to select a bucket.
var h maphash.Hash
h.SetSeed(m.seed)
h.WriteString(nsID.String()) //nolint:revive
hs := h.Sum64()
idx := int(hs % uint64(len(m.buckets)))
return m.buckets[idx]
}
// upsertHeartbeat records or refreshes a WorkerHeartbeat under the given namespace.