Bump pydantic from 2.3.0 to 2.6.1 in /core

Bumps [pydantic](https://github.com/pydantic/pydantic) from 2.3.0 to 2.6.1.
- [Release notes](https://github.com/pydantic/pydantic/releases)
- [Changelog](https://github.com/pydantic/pydantic/blob/main/HISTORY.md)
- [Commits](pydantic/pydantic@v2.3.0...v2.6.1)

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

Signed-off-by: dependabot[bot] <[email protected]>

core/requirements.txt

@@ -2,7 +2,7 @@ fastapi==0.103.1
 uvicorn[standard]==0.23.2
 python-jose[cryptography]==3.3.0
 passlib==1.7.4
-pydantic==2.3.0
+pydantic==2.6.1
 pydantic-settings==2.0.3
 loguru==0.7.2
 numpy==1.25.2