build(deps): bump the minor-and-patch group in /backend with 5 updates

Squash merge Dependabot backend minor-and-patch dependency updates from PR #443.

backend/package.json

@@ -32,17 +32,17 @@
     "dotenv": "^17.3.1",
     "drizzle-orm": "^0.45.1",
     "fastify": "^5.8.2",
-    "nodemailer": "^8.0.1",
+    "nodemailer": "^8.0.2",
     "openid-client": "^6.8.2",
     "sharp": "^0.34.5",
     "zod": "^3.23.8"
   },
   "devDependencies": {
-    "@biomejs/biome": "^2.4.6",
-    "@types/node": "^25.3.5",
+    "@biomejs/biome": "^2.4.7",
+    "@types/node": "^25.5.0",
     "@types/nodemailer": "^7.0.11",
     "@types/supertest": "^7.2.0",
-    "@vitest/coverage-v8": "^4.0.18",
+    "@vitest/coverage-v8": "^4.1.0",
     "drizzle-kit": "^0.31.9",
     "pino-pretty": "^13.1.3",
     "supertest": "^7.2.2",