-- pg_turbovec v1.12.0 -- out-of-core IVF build (Phase B-4).
--
-- This file is a *reference mirror*. The authoritative install
-- script is generated by `cargo pgrx schema`.
--
-- v1.12.0 makes the IVF build (WITH (lists = N)) out-of-core so it
-- can build 1M-5M+ row indexes on a RAM-constrained host. Before,
-- the lists>0 build held the full f32 corpus TWICE in RAM
-- (~14 GiB peak at 1M x 1024-d) and OOM-killed builds at 1M+.
--
-- Now the corpus spills to a PostgreSQL BufFile temp (in pgsql_tmp,
-- respecting temp_tablespaces / temp_file_limit, RAII-cleaned on
-- abort). The build streams in three passes bounded by
-- maintenance_work_mem; the only RAM term that scales with row count
-- is the QUANTIZED packed_codes (7-15x smaller than the f32 corpus).
-- Measured: 1M x 1024-d x lists=1024 peak RSS ~14 GiB (OOM) ->
-- ~7.1 GiB (completes); 5M projected ~8-10 GiB.
--
-- This is a BUILD-INTERNAL change. The on-disk relfile is
-- byte-identical to a v1.11.x in-memory build for the same input
-- (verified) and is maintenance_work_mem-invariant. MetaPageData::
-- version stays 4. The flat (lists=0) build path is unchanged.
-- There is no DDL, no on-disk migration, and NO REINDEX.
-- `ALTER EXTENSION pg_turbovec UPDATE TO '1.12.0';` resolves against
-- this intentionally-empty file.