Move to a single prisma client connection for the ui backend to prevent competing connections.

ui/src/app/api/queue/route.ts

@@ -1,7 +1,5 @@
 import { NextResponse } from 'next/server';
-import { PrismaClient } from '@prisma/client';
-
-const prisma = new PrismaClient();
+import prisma from '@/server/prisma';
 
 export async function GET(request: Request) {
   const { searchParams } = new URL(request.url);