- Take `Arc<Catalog>` by value again through the validation entry points.
`AppState::catalog()` returns an owned `Arc`, so `&state.catalog()` was
cloning, borrowing the temporary, then cloning again at the leaf. Every
consumer ends up owning the `Arc`, so by-value is the honest shape and it
drops one clone per call. The one caller holding the catalog in a field
now says `Arc::clone(&self.catalog)` explicitly.
- Correct the `RenderMode` doc comment. It claimed `Strict` is "used by
run-create", but run-create renders `Structural` and promotes the
resulting warnings to errors itself; `Strict` has no production caller.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
