build(deps): bump the minor-and-patch group in /backend with 3 updates

Bumps the minor-and-patch group in /backend with 3 updates: [fastify](https://github.com/fastify/fastify), [@biomejs/biome](https://github.com/biomejs/biome/tree/HEAD/packages/@biomejs/biome) and [@types/node](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/node).


Updates `fastify` from 5.8.1 to 5.8.2
- [Release notes](https://github.com/fastify/fastify/releases)
- [Commits](https://github.com/fastify/fastify/compare/v5.8.1...v5.8.2)

Updates `@biomejs/biome` from 2.4.4 to 2.4.6
- [Release notes](https://github.com/biomejs/biome/releases)
- [Changelog](https://github.com/biomejs/biome/blob/main/packages/@biomejs/biome/CHANGELOG.md)
- [Commits](https://github.com/biomejs/biome/commits/@biomejs/biome@2.4.6/packages/@biomejs/biome)

Updates `@types/node` from 25.3.3 to 25.3.5
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/node)

---
updated-dependencies:
- dependency-name: fastify
  dependency-version: 5.8.2
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: minor-and-patch
- dependency-name: "@biomejs/biome"
  dependency-version: 2.4.6
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: minor-and-patch
- dependency-name: "@types/node"
  dependency-version: 25.3.5
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: minor-and-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

backend/package.json

@@ -29,15 +29,15 @@
     "argon2": "^0.44.0",
     "dotenv": "^17.3.1",
     "drizzle-orm": "^0.45.1",
-    "fastify": "^5.8.1",
+    "fastify": "^5.8.2",
     "nodemailer": "^8.0.1",
     "openid-client": "^6.8.2",
     "sharp": "^0.34.5",
     "zod": "^3.23.8"
   },
   "devDependencies": {
-    "@biomejs/biome": "^2.4.4",
-    "@types/node": "^25.3.3",
+    "@biomejs/biome": "^2.4.6",
+    "@types/node": "^25.3.5",
     "@types/nodemailer": "^7.0.11",
     "@types/supertest": "^7.2.0",
     "@vitest/coverage-v8": "^4.0.18",