build(deps-dev): bump the development group

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


Updates `@biomejs/biome` from 2.5.11 to 2.5.12
- [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@2.5.12/packages/@biomejs/biome)

Updates `@types/node` from 26.4.0 to 26.4.1
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/node)

Updates `vitest` from 4.1.11 to 5.0.0
- [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/v5.0.0/packages/vitest)

---
updated-dependencies:
- dependency-name: "@biomejs/biome"
  dependency-version: 2.5.12
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: development
- dependency-name: "@types/node"
  dependency-version: 26.4.1
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: development
- dependency-name: vitest
  dependency-version: 5.0.0
  dependency-type: direct:development
  update-type: version-update:semver-major
  dependency-group: development
...

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

services/backend/package.json

@@ -31,7 +31,7 @@
   "devDependencies": {
     "@biomejs/biome": "latest",
     "@types/express": "^5.0.6",
-    "@types/node": "^26.4.0",
+    "@types/node": "^26.4.1",
     "@types/pg": "^8.23.1",
     "@types/ws": "^8.18.1",
     "tsx": "^4.23.13",