refactor(Studies/Luce1959): absorb jnd semiorder and Weber bridge - #1714
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Dissolves the second Luce bridge file (
Processing/Psychophysics/PsychophysicalChoice.lean, zero importers) and moves the then consumer-lessChoiceApproximations.lean(§1.G jnd semiorder + trace) intoStudies/Luce1959.lean, per the single-paper anchoring rule.Psychophysics:StevensScale.choiceProb_eq_pairwiseProbandchoiceProb_le_iffreplace the bridge's identity and its trace-costumed monotonicity; the two trivial jndL/jndI unfolding lemmas are dropped.Studies/Luce1959: gains the §1.G section and the §2.B Weber-ratio lemma — verified against the book: the(π/(1−π))^(1/n)intensity ratio is Luce's own §2.B estimation equation, so it is genuine paper content, unlike the §1.G↔§2.F synthesis deleted in refactor(Core/Probability/Choice): dissolve SemiorderRanking bridge #1713.