Wallet activity on picks they EXITED.

Exit-side only: whale_picks stores how many whales entered, never which, so nothing here may imply a wallet selected or called a pick. Rows carry a truncated address; the caller links to /wallet/<address>.

CURRENTLY-TRACKED ONLY: every wallet here is INNER-JOINed to tracked_wallets, so a wallet the reranker has since evicted (exchange / market-maker / churned-out, sub-threshold) does not appear even though its historical pick-exits remain in whale_pick_exits. Before this, the LEFT JOIN let evicted wallets through — their NULL churn passed the churn <= 250 guard — and they dominated the list because high-churn addresses have the most exits (93% of the old list was untracked).