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

Bumps the minor-and-patch group in /backend with 5 updates:

| Package | From | To |
| --- | --- | --- |
| [nodemailer](https://github.com/nodemailer/nodemailer) | `8.0.7` | `8.0.8` |
| [@types/node](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/node) | `25.8.0` | `25.9.1` |
| [@vitest/coverage-v8](https://github.com/vitest-dev/vitest/tree/HEAD/packages/coverage-v8) | `4.1.6` | `4.1.7` |
| [tsx](https://github.com/privatenumber/tsx) | `4.22.1` | `4.22.3` |
| [vitest](https://github.com/vitest-dev/vitest/tree/HEAD/packages/vitest) | `4.1.6` | `4.1.7` |


Updates `nodemailer` from 8.0.7 to 8.0.8
- [Release notes](https://github.com/nodemailer/nodemailer/releases)
- [Changelog](https://github.com/nodemailer/nodemailer/blob/master/CHANGELOG.md)
- [Commits](https://github.com/nodemailer/nodemailer/compare/v8.0.7...v8.0.8)

Updates `@types/node` from 25.8.0 to 25.9.1
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/node)

Updates `@vitest/coverage-v8` from 4.1.6 to 4.1.7
- [Release notes](https://github.com/vitest-dev/vitest/releases)
- [Changelog](https://github.com/vitest-dev/vitest/blob/main/docs/releases.md)
- [Commits](https://github.com/vitest-dev/vitest/commits/v4.1.7/packages/coverage-v8)

Updates `tsx` from 4.22.1 to 4.22.3
- [Release notes](https://github.com/privatenumber/tsx/releases)
- [Changelog](https://github.com/privatenumber/tsx/blob/master/release.config.cjs)
- [Commits](https://github.com/privatenumber/tsx/compare/v4.22.1...v4.22.3)

Updates `vitest` from 4.1.6 to 4.1.7
- [Release notes](https://github.com/vitest-dev/vitest/releases)
- [Changelog](https://github.com/vitest-dev/vitest/blob/main/docs/releases.md)
- [Commits](https://github.com/vitest-dev/vitest/commits/v4.1.7/packages/vitest)

---
updated-dependencies:
- dependency-name: nodemailer
  dependency-version: 8.0.8
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: minor-and-patch
- dependency-name: "@types/node"
  dependency-version: 25.9.1
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: minor-and-patch
- dependency-name: "@vitest/coverage-v8"
  dependency-version: 4.1.7
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: minor-and-patch
- dependency-name: tsx
  dependency-version: 4.22.3
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: minor-and-patch
- dependency-name: vitest
  dependency-version: 4.1.7
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: minor-and-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

backend/package.json

@@ -34,21 +34,21 @@
     "fastify": "^5.8.5",
     "fastify-plugin": "^5.0.1",
     "jose": "^6.2.3",
-    "nodemailer": "^8.0.7",
+    "nodemailer": "^8.0.8",
     "openid-client": "^6.8.4",
     "sharp": "^0.34.5",
     "zod": "^4.4.3"
   },
   "devDependencies": {
     "@biomejs/biome": "^2.4.15",
-    "@types/node": "^25.8.0",
+    "@types/node": "^25.9.1",
     "@types/nodemailer": "^8.0.0",
     "@types/supertest": "^7.2.0",
-    "@vitest/coverage-v8": "^4.1.6",
+    "@vitest/coverage-v8": "^4.1.7",
     "drizzle-kit": "^0.31.10",
     "pino-pretty": "^13.1.3",
     "supertest": "^7.2.2",
-    "tsx": "^4.22.1",
+    "tsx": "^4.22.3",
     "typescript": "^6.0.3",
     "vitest": "^4.0.16"
   },