Performance Boost & Bug Fix-Next.js Dashboard

Bug fix + performance task in a Next.js 14 / TypeScript / Prisma / PostgreSQL real-time dashboard app. Context: the app polls a leaderboard endpoint every 2 seconds to show ranked results from an Event table (user activity events with type, userId, timestamp, and a numeric value field)... (Budget: $30 - $250 USD, Jobs: JavaScript, Next.js, Node.js, Performance Tuning, PostgreSQL, Prisma)