fix: update maxDuration constant to use seconds for clarity in agent route

Author: VISHWAJ33T

apps/mediamake/app/api/studio/chat/dev/agent/[...slug]/route.ts

@@ -3,7 +3,7 @@ import { getClientId } from '@/lib/auth-utils';
 import { UIMessage } from 'ai';
 import { NextRequest } from 'next/server';
 
-export const maxDuration = 30 * 60; // 30 minutes
+export const maxDuration = 1800; // 1800 seconds = 30 minutes
 
 export async function GET(req: NextRequest) {
   //const body = req.body;