DA pass found three change sites the first sketch missed
(teaching-echo renderers, --create-fk per-column creation, the
auto-name generator) and made explicit the rules the forks left
implicit: SQLite FK precondition (compound PK provides the unique
index), explicit parent cols must be the PK set (any order,
positional), arity/empty/inline-rejection wording, single-in-parens
accepted, --create-fk per-column typed to fk_target_type. Expanded
the test plan to cover enforcement, auto-expand, undo, round-trip.
Fixed a stale 'legacy yaml loads' test line (no back-compat).
claude@clouddev1
b688592b4c