Get latest odds for a future.
Lookup mode: required futureId + optional filters (bookmakers, since, mainLines, includeFuture).
Your API key (query-based auth for v5).
Single future ID (e.g. id11000132131631).
Comma/space-separated bookmaker slugs (default: all)
createdAt >= since (unix sec)
Only return main lines
If true, includes futureMeta in the response.