Scout KOL leaderboard on Robinhood Chain (PRO+)

Robinhood Chain port of GET /kol/scouts/leaderboard (2026-10-15). A first touch is a KOL buy of a token no KOL bought before (chain order). Per KOL: first touches in the last 30 days that are at least 4 hours old, how many other KOLs bought within 4 hours (avg_followers_4h), and the share that drew ≥3 / ≥5 (swarm_3plus_pct / swarm_5plus_pct). scout_tier S ≥ 40 / A ≥ 25 / B ≥ 15 / C on swarm_3plus_pct, null below 30 first touches.

Differences from Solana: identity is the KOL (a KOL with several EVM addresses is one scout and never its own follower; evm_addresses lists them), and KOLs below min_first_touches (default 30) are left out instead of listed with a null tier. Computed point in time as of as_of (no MV), cached 5 minutes. 503 scout_scores_unavailable when the score cannot be computed (never an empty ranking).