Public Freshness

Per-bookmaker freshness — last_update summary across all markets.

Returns: bookmakers: [ { key, market_count, latest_update, staleness_seconds, is_stale } ] stale_threshold_seconds as_of (server time the rows were sampled)

staleness_seconds is the time since the most recent successful market write for the book — a rough proxy for "how fresh is the freshest line on this book." It overstates per-event freshness because any single market touch resets it; for the marketing page that's fine since the public claim we're backing is "we ingest book data continuously and recently."