CodeRabbit follow-up for #4293. Add 2026-10-26 revision-history rows and
status-line updates for EPS Save and Save As in file-format-parity, gaps
(G9), roadmap and target-app-parity; move the completed EPS Save note in
roadmap's M4 row out of "Left:". Save-back is recorded as done; G9 import
fidelity and Illustrator editing-data writing (#868) are unchanged. Scores
and estimates unchanged. Docs only.