v2.46.0

Added

• Table_Node::store_multi() — the half lookup_multi() never had. A reader resolving a set of ids has always paid one getMulti; a writer paid one round trip per key, which is what made ELN's stats flush cost scale with URL cardinality rather than with volume. Cache_Backend::write_multi() now returns whether the set landed, so a caller can tell. Whole-batch only: neither backend reports success per KEY — memcached's setMulti is one bool and apcu returns the failures — so a caller that must know which key was refused re-sends that batch through store().