Variable HONUA_COLUMNAR_BATCH_CACHE_FORMATConst Experimental

HONUA_COLUMNAR_BATCH_CACHE_FORMAT: "honua.columnar-batch-cache/1.0" = ...

Versioned format string stamped on every persisted record. A record whose format differs is corrupt to this build and is discarded on read, so a future record layout can never be misinterpreted as this one.