e4fb64d7c6
Task 7 of the bound-override cycle: the design ledger's C12 records the bound-as-default semantics (axis 1 may name a bound param; identity reads the authored document; the retired axes-bind-only-open-knobs restriction was an implementation consequence, not a recorded decision), the glossary's blueprint entry carries the same sentence, and the authoring-guide's data-only starter section explains the one-file run+sweep quickstart. closes #246