-- pg_turbovec v2.12.0
--
-- MINOR: faster exact-distance recheck. No SQL-surface change, no GUC change,
-- no wire-format change (MetaPageData::version stays 8); index bytes and
-- normalised codes are unchanged, so NO REINDEX. `ALTER EXTENSION pg_turbovec
-- UPDATE TO '2.12.0'` plus reconnecting (to load the new library) is
-- sufficient.
--
-- - The exact distance kernels sum in 8 independent f64 lanes (~3x faster per
--   call at 1024-d). Results for vectors of 8+ dimensions can differ from
--   2.11.0 by rounding (measured max ~4.5e-13 relative, ~1e-12 absolute
--   for cosine; worst on constant 16000-d vectors); this is why the
--   release is a minor, not a patch (docs/UPGRADING.md: patches require
--   bit-identical scoring).
-- - The distance functions decode a repeated (constant) operand once per
--   expression instead of once per call, and cosine reuses its norm.
-- - Measured together: 1.26x (default storage) / 1.43x (STORAGE MAIN) at
--   search_k = 1024 on 500k x 1024-d (benches/results/perf_abc_20261006/step5).
--
-- Function names, argument types, STRICT/IMMUTABLE/PARALLEL SAFE markings and
-- C symbols are unchanged (pinned by distance_cache_null_and_markings_unchanged).