Substring matching over question_lower flagged non-crypto markets as crypto:
'dissolved' matched 'sol', 'Canada' matched 'ada', 'Seth' matched 'eth'.
Those false flags armed the BTC-dominance signal (btc_dom_lo=+0.06 observed
on politics markets in production).
Short tickers (btc, eth, sol, xrp, doge, ltc, bnb, ada, avax) now go through
has_token(), which requires non-alphanumeric boundaries so 'ETH', '$ETH' and
'ETH/USD' still match. Long unambiguous names (bitcoin, ethereum, solana,
cardano, ...) remain substring checks.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
