Search / browse markets with server-side filters.

Filters (all SQL-side so total reflects full match set, not just page): q — text search (also accepts Polymarket URL/slug) category — All | Crypto | Geopolitics | Sports | Politics | Economics | Tech/AI min_volume — minimum volume USD min_whales — minimum total smart whales (yes+no) min_days — minimum days until end_date max_days — maximum days until end_date limit — page size (default 50, max 200) offset — pagination offset

Returns: {markets, total, limit, offset, _elapsed_ms}