Update to add challenge ID to payments response, per Topgear request

Author: jmgasper

sql/reports/topgear/payments.sql

@@ -1,12 +1,14 @@
 SELECT
   p.payment_id,
+  w.external_id as challenge_id,
   p.gross_amount,
   p.net_amount,
   p.total_amount,
   p.payment_status,
   p.billing_account,
   p.created_at
 FROM finance.payment p
+INNER JOIN finance.winnings w on p.winnings_id = w.winning_id
 WHERE p.created_at >= $1::timestamptz
   AND p.created_at <= $2::timestamptz
 ORDER BY p.created_at DESC;