Add the reviewed minimal X1 bulged-path producer, conservative bounds,
ordered layered bulge reader, ELLIPSE/TEXT imports and two original
cross-feature cases. Preserve legacy entry points; retain the two explicit
source-supported fixture migrations, not a blanket assertion relaxation.
Include the three original owner corrections from #8534 to unblock wasm,
without adopting later main or transferring upstream validation.
Normal cargo fmt --all passed. 223 declarations in the nine IO files
(333 including 110 unchanged UI/web declarations) are not test results.
This WIP has not been compiled or run; full CI and caller migration remain.
Earlier-source native passes do not qualify this candidate.
Co-authored-by: Ray <raykholo@users.noreply.github.com>