Catalogues, section-by-section against Pace's Part-2 article, every
ESPectre technique RuView has and does not have, plus a prioritized
roadmap (9 items, NVS persistence and FP-rate validation top of list).
Replaces the 8-item inline "open items" stub in espectre-techniques.md
with a 1-line forward link. Both files stay ≤ 200 lines per the docs
convention.
arsen