feat: enhance logging in PrismaClient for better query, warning, and error visibility

nest-backend/src/lib/prisma.ts

@@ -1,5 +1,11 @@
 import { PrismaClient } from '@prisma/client';
 
-const prisma = new PrismaClient();
+const prisma = new PrismaClient({
+  log: [
+    { emit: 'stdout', level: 'query' },
+    { emit: 'stdout', level: 'warn' },
+    { emit: 'stdout', level: 'error' },
+  ],
+});
 
 export default prisma;