-- pg_turbovec v1.11.0 -- IVF survives VACUUM (tombstones) + 7.8x
-- faster IVF k-means build.
--
-- This file is a *reference mirror*. The authoritative install
-- script is generated by `cargo pgrx schema`.
--
-- v1.11.0 hardens IVF for production (Phase A-1 + E-2 of
-- ):
--
--   E-2: An IVF index used to silently degrade to a flat O(n) scan
--   after VACUUM (swap-remove broke cell contiguity). Now the IVF
--   ambulkdelete path tombstones dead slots (a persisted per-slot
--   bitmap, a new v4-additive relfile chain) instead of moving rows,
--   so cells stay contiguous and the index STAYS IVF through deletes.
--   Tombstoned rows are excluded from every scan mask. For the
--   safety-net case, degradation is now observable: a throttled
--   scan-time WARNING + a new SQL function:
--
--       turbovec.index_is_degraded(regclass) -> bool
--
--   A-1: IVF k-means training is GEMM-batched + convergence-early-
--   exit, ~7.8x faster (build-internal; no surface or wire change).
--
-- Wire format stays at MetaPageData::version = 4. The tombstone
-- bitmap and the ivf_degraded flag are ADDITIVE: pre-1.11.0 v4
-- indexes read as not-degraded / no-tombstones. There is no on-disk
-- migration and NO REINDEX is required. The new index_is_degraded()
-- function is created by cargo pgrx schema; this file is otherwise
-- intentionally empty. `ALTER EXTENSION pg_turbovec UPDATE TO
-- '1.11.0';` resolves cleanly.