Brummel
c0dd2bc334
8 tasks. Closes the prelude-decouple milestone by deleting examples/prelude.ail.json and sweeping the surviving consumers + spec text + inventory. Three production consumers retire: the migrate-bare- cross-module-refs defensive include in ail/src/main.rs (with its lockstep skip-branch), the cross-form-identity preflight test in ailang-surface (its purpose discharged at pd.2-close), and one in-mod test in core's workspace.rs (re-pointed from inline include_str! to ailang_surface::parse_prelude via the dev-dep). Adds a carve-out retirement pin asserting the JSON file does NOT exist. Updates carve_out_inventory.rs (eight → seven; §C4(b) row dropped) and the form-a-default-authoring spec §C4(b) (RETIRED status marker added, historical text preserved).