Retrieve a list of event-scoped betting markets. Use GET /api/v1/odds
for odds, sportsbook, aggregator, and mainline filters.

Crypto (league_id=CRYPTO; entitled tenants only). One market per contract family per
window (market_type = "up_down", id = the market_id carried on odds rows), plus one
per unverified Limitless mirror (metadata.alignment = "unverified_mirror", listed but
not addressable by /markets/{id} in v1). canonical_status resolved means "trading
closed; a result may be pending", not "a result exists": read metadata.result_state
(pending, resolved, voided) to know whether to settle. The set is the live and
upcoming-within-60-minutes windows, or one window via event_id; asset and horizon
filter. tournament_id and market_group_id are a 400 for this league.