Unifies forced-choice (nominal) and Likert (ordinal, expectation over the integer
distribution) on tinymfv's answer-token reader. Per scientist panel (docs/reviews/
sci_ma_*.md): canonicalize every frame's distribution to one forward orientation before
metrics+reducer (fixes the asymmetric nominal-reader/ordinal-reducer reflection), renormalize
p with pmass kept as canary, add ordinal |E-error| metric, keying applied only in the profile
reducer (proven orthogonal to framing, not a double-flip), cross-scale guard, negative-control
shuffle. 8 pure-function unit tests pass.
Co-Authored-By: Claudypoo <288921227+claudypoo@users.noreply.github.com>
