Get one two-member matched event

Candles from the lake in (market_id, token_id, ts) order. With event_id, active members are read in (venue, market_id) order, each in that table order. With venue alone, the same key across the venue's markets. Exactly one selector: venue with market_id, event_id alone, or venue alone. from is inclusive and clamped to the plan's history; to is exclusive and must be after from. With venue alone, from and to are at most 7 days apart. Candles count each trade once (an order book match's maker legs, a market maker trade's one row) and arrive within an hour. event_id resolves an approved matched event the caller can see and reads its active members only; members outside the plan's candle venues are left out, and members whose venue's trades rights are not raw contribute no rows. A missing or hidden event_id is 404. Free and History include Polymarket daily candles (res=1d); other venues and resolutions need the builder plan.