fix: correct nodemailer SES transport config for v9 API

SES transport expects { sesClient, SendEmailCommand }, not { sesv2, ses }

server.js

@@ -13,7 +13,7 @@
 import express from 'express';
 import cors from 'cors';
 import nodemailer from 'nodemailer';
-import { SESv2Client } from '@aws-sdk/client-sesv2';
+import { SESv2Client, SendEmailCommand } from '@aws-sdk/client-sesv2';
 import { fileURLToPath } from 'node:url';
 import { dirname, join } from 'node:path';
 import { readFileSync, existsSync } from 'node:fs';
@@ -35,7 +35,7 @@ if (sesConfigured) {
     },
   });
   transporter = nodemailer.createTransport({
-    SES: { sesv2: true, ses },
+    SES: { sesClient: ses, SendEmailCommand },
   });
 }