feat: email verification + delete confirmation + smtp/cors/prod hardening

api/package.json

@@ -19,6 +19,7 @@
   },
   "devDependencies": {
     "@types/node": "^20.19.25",
+    "@types/nodemailer": "^7.0.9",
     "@types/supertest": "^6.0.3",
     "prisma": "^5.22.0",
     "supertest": "^6.3.4",
@@ -36,6 +37,7 @@
     "date-fns-tz": "^3.2.0",
     "fastify": "^5.6.2",
     "node-cron": "^4.2.1",
+    "nodemailer": "^7.0.13",
     "zod": "^3.23.8"
   }
 }