aio: io_uring: Trigger async processing for large IOs

read_stream: Only increase read-ahead distance when waiting for IO

read stream: Split decision about look ahead for AIO and combining

heapam: Keep buffer pins across index scan resets.

heapam: Track heap block in IndexFetchHeapData.

Add ssup_datum_uint32_cmp for comparing OIDs

Fix unlikely incremental tuple deform bug with missing attrs

Fix autovacuum-induced flakiness in backwards scan test.

Add test coverage for nbtree backwards scans.

Run nbtree test module tests under autoconf builds

Add _bt_set_startikey row compare test coverage.

Add tests for nbtree empty index predicate locking.

Fix another empty nbtree index SSI race.

Fix race in SSI interaction with empty btrees.

Fix race in SSI interaction with gin fast path.

Fix race in SSI interaction with bitmap heap scan.

doc PG 19 relnote: move Oauth items

doc PG 19 relnotes: swap OAUTH hook and validator items

doc PG 19 relnotes: "OAUTH validators to supply failure item"

doc PG 19 relnotes: fix autovacuum_vacuum_score_weight prefix

doc PG 19 relnotes: remove VALIDATE CONSTRAINT lock item

Fix GiST index-only scan column alignment issue.

Fix wrong variable offset sanity check.

Use fake LSNs consistently in hash index AM.

Shorten pg_attribute_always_inline to pg_always_inline