release-crate-docs: crate docs final pass — doc gate green with -D warnings posture recorded in AGENTS.md, warn(missing_docs) adopted on the four published crates (audit probe 0; Error enum+fields, sqlite substrate fuzz-surface fns filled), accuracy pass fixed core drifts (trim_to wake nuance, ADR-023 §2 domain rules + shared paragraph, QueueOpts gloss, MemStore::new exception) and engine postures (eleven-vs-ten tx-method count, spawn_blocking rationale via sync substrate, one-host cross-process honesty element), spec-side aligned (pg locks family + row-backed wording, mem clock-accessor home), two boundary-wording dispositions recorded for release-contract-window-close (try_recv arms, 8000-byte <= reading), queue round-trip doctest landed in alkstore-mem crate docs; task -> completed with Notes + Summary

alkstore-sqlite/src/store.rs

@@ -26,9 +26,12 @@
 //! [`SqliteStore::close`].
 //!
 //! Every engine call round-trips the `spawn_blocking` seam
-//! ([`crate::seam`]); rusqlite connections are not
-//! `Send`-across-await. Single-host by nature: file-backed, one
-//! machine; NFS two-writers-unsupported (the lineage's honesty
+//! ([`crate::seam`]) — the substrate is sync machinery (std threads,
+//! blocking iterators) bridged at the trait seam, per the family
+//! REQ-TTY-01 posture. Single-host by nature: file-backed, one
+//! machine; cross-process on one host is verified ground
+//! (`data_version` is cross-process by nature); NFS
+//! two-writers-unsupported (the lineage's honesty
 //! posture, inherited — ADR-016).
 
 use alkstore::Store;