EVAL fixes: market-odds range Apr→Jun in README, fix Ipsos 'Péru' typo + normalize runoff pollster labels

README: add Notable divergences section (Álvarez market 31.6% vs poll 8%, etc.)

Add Polymarket odds + market×poll divergence (first round)

Peru 2026 electoral divergence — polls (36 first-round/14 candidates + 16 runoff) + docs + build pipeline