tokenized-stock-peg: bench 076, first onchain equity pricing bench - #1143

Summary

• New harness: reads 11 tokenized equity pool prices on Robinhood Chain (Uniswap v4 StateView getSlot0, one keyless batched eth_call/min, per-pool currency orientation handled) vs Yahoo reference (one spark batch/min, session labels from currentTradingPeriod, holiday-aware, no NYSE calendar maintained)
• Headline: deviation bps during regular hours; the closed-session series is the weekend drift panel (pools trade 24/7, Nasdaq does not)
• Cohort verified pool by pool: NVDA, AAPL, GOOGL, TSLA, PLTR, META, AMD, MSFT, AMZN, SPY, MU. Excluded with reasons: SPCX (no listed reference), SNDK/QQQ (depth under $2k), CRCL (zero liquidity), 80 placeholder pools, HOOD (never issued)
• Smoke tested end to end: 11/11 onchain prices decoded (AAPL 319.01 USDG vs independent verification 319.42), Yahoo both endpoints ok
• Gated in REMOVED_BENCH_SLUGS (staging pipeline)