chore(deps)(deps): bump pydantic from 2.12.5 to 2.13.0 in /backend

Bumps [pydantic](https://github.com/pydantic/pydantic) from 2.12.5 to 2.13.0.
- [Release notes](https://github.com/pydantic/pydantic/releases)
- [Changelog](https://github.com/pydantic/pydantic/blob/main/HISTORY.md)
- [Commits](pydantic/pydantic@v2.12.5...v2.13.0)

---
updated-dependencies:
- dependency-name: pydantic
  dependency-version: 2.13.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

backend/pyproject.toml

@@ -23,7 +23,7 @@ dependencies = [
     "openpyxl>=3.1.5",
     "passlib>=1.7.4",
     "punq>=0.7.0",
-    "pydantic>=2.11.9",
+    "pydantic>=2.13.0",
     "pyjwt>=2.12.1",
     "pymongo>=4.15.1",
     "pytest>=9.0.3",