Bump pydantic from 1.10.22 to 2.12.5 in /backend

Bumps [pydantic](https://github.com/pydantic/pydantic) from 1.10.22 to 2.12.5.
- [Release notes](https://github.com/pydantic/pydantic/releases)
- [Changelog](https://github.com/pydantic/pydantic/blob/main/HISTORY.md)
- [Commits](pydantic/pydantic@v1.10.22...v2.12.5)

---
updated-dependencies:
- dependency-name: pydantic
  dependency-version: 2.12.5
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

backend/requirements.txt

@@ -24,7 +24,7 @@ passlib==1.7.4
 # passlib==1.8.1 (wrong version cant deploy)
 psycopg2-binary==2.9.7
 pycparser==3.0
-pydantic==1.10.22
+pydantic==2.12.5
 # PyJWT==2.7.0
 PyJWT==2.12.1
 python-multipart==0.0.22