uuid 1.x → getrandom 0.4.x requires edition = "2024", stabilized in Rust 1.85.
The Task 1 pin of 1.80 was written when uuid 1.x resolved to a getrandom that
still compiled on edition 2021; the resolution has shifted. The brief said
'confirm the latest stable at impl time' — bumping the pin is faithful to that.
Plan doc's Task 6 CI matrix also updated: [stable, "1.85"].
Cross-task correction in response to Task 2 implementer's DONE_WITH_CONCERNS
escalation; not a Task 2 code change.
Workspace root, pinned toolchain, and the three stub crates whose only
job in slice 1 is to lock the ADR-0002 boundary shape. Each ships a
lib.rs module doc (what it will hold, why deferred, which spearhead step
fills it) and a crate_compiles test. Spec §2.2.
