glm-5.3-flash
1efc46f953
The 'postgres' kv-tier engine (ADR-007, feature 'postgres', default-off) against the wave-1 trait: the sqlite engine's structural twin on a Pooled-Postgres driver cluster. - One engine-owned schema (default 'alkblobs'; quoted-identifier boundary via the alkstore quote_identifier pattern) holding the B5 row shape — key bytea PK / value bytea NOT NULL / size bigint NOT NULL, WITH (fillfactor = 90) — idempotently bootstrapped at construction; autovacuum and the ~40x small-tier storage overhead recorded as posture, not silence - deadpool pool with DEFAULT_MAX_SIZE = 8 (load-bearing, POC #5 B2); per-connection prepare_cached discipline (B5: statements die with sessions); the synchronous_commit parity knob as connect options on every pooled connection (default 'on', configurable, alkstore src/opts.rs mechanics) - CAS first-writer-wins (INSERT ... ON CONFLICT DO NOTHING) on both put forms; metadata-only size probe riding the PK index (EXPLAIN gate-tested); EXISTS has; materializing get cursor; degenerate in-memory stage with both hygiene forms (fail_commit injection) - list: the single-statement MVCC-snapshot cursor (portal-batched row stream, keys only); crate-internal batch-delete helper (DELETE ... WHERE key = ANY() over bytea[]), scope-noted until wave 6; virgin-store read-only split via SQLSTATE 42P01 mapping - 15 in-module unit tests, env-driven (ALKBLOBS_PG_*), skipping cleanly server-less; green against the dockerized pglo-poc harness server (:15432) Verified: cargo test; cargo test --features postgres (84 lib tests); cargo test --all-features (139); clippy all-targets, default + features + all-features, -D warnings; fmt --check; doc --no-deps.