-- pg_turbovec v1.13.0 -- out-of-core IVF query / >RAM serving (Phase B-1/B-2).
--
-- This file is a *reference mirror*. The authoritative install
-- script is generated by `cargo pgrx schema`.
--
-- v1.13.0 lets an IVF index (built WITH (lists = N)) larger than RAM
-- be QUERIED. The scan previously loaded the whole index into a
-- per-backend cache (O(n) resident). Now it can serve cell-scoped:
-- cache only bounded metadata (coarse centroids, cell directory,
-- rotation, codebook, per-slot scales/ids) plus a MAP_PRIVATE mmap
-- of the relfile, and copy only the probed cells' contiguous code
-- ranges off the mmap per query. Resident set drops to
-- O(probes * cell_size + faulted pages); hot cells stay in the OS
-- page cache, cold cells fault on demand.
--
-- New GUC: turbovec.out_of_core (enum off | auto | on, default
-- auto). auto goes cell-scoped only when the index codes exceed
-- 0.5 * turbovec.cache_size_mb, so an in-RAM index loads whole (no
-- per-query reblock cost) and only a genuinely large index pays the
-- bounded-memory-for-CPU tradeoff. Pairs with the v1.12.0
-- out-of-core BUILD to make IVF usable end-to-end above RAM.
--
-- This is a SCAN-PATH change only. The on-disk relfile format is
-- UNCHANGED (MetaPageData::version stays 4); results are identical
-- to the whole-load path (probes >= lists still reduces to the
-- exact flat scan; tombstones masked; soft-assign deduped). There
-- is no DDL, no on-disk migration, and NO REINDEX. `ALTER EXTENSION
-- pg_turbovec UPDATE TO '1.13.0';` resolves against this
-- intentionally-empty file.