Rep leaderboard, Rep of the Month and monthly goal

The leaderboard ranks reps each month by schools signed. Switch to Sponsorships to rank by sponsorships sold. Reps only see their own revenue and commission. When a month ends, the #1 rep by schools signed is Rep of the Month: a gold badge on the leaderboard and a trophy on their dashboard. If Scout Stream sets a monthly schools-signed goal, everyone sees a progress bar toward it.