Per-cycle fieldtest over the #246 surface, consumer-perspective, public
interface only: the scaffold quickstart end to end (aura new -> run ->
--list-axes -> override sweep), --list-axes on a partially-open
blueprint, an override family reproduced bit-identically (3/3 members),
and the error surface (wrong axis name, kind-mismatched value — both
exit 2). Corpus under fieldtests/cycle-246-bound-override/.
Dispositions: the one bug (F6) is fixed in this commit — authoring-guide
§1 still asserted a bound param 'never shows up in --list-axes' and 'no
aura sweep --axis can reopen it', contradicting the shipped #246
semantics and the C12 amendment; the three-states paragraph now reads
open = must-bind, bound = overridable default. The friction finding (F5,
KindMismatch/MissingKnob printed as raw Debug structs beside polished
prose) is filed as #247.
refs #246
