Bump pydantic from 2.7.1 to 2.7.3

Bumps [pydantic](https://github.com/pydantic/pydantic) from 2.7.1 to 2.7.3.
- [Release notes](https://github.com/pydantic/pydantic/releases)
- [Changelog](https://github.com/pydantic/pydantic/blob/main/HISTORY.md)
- [Commits](pydantic/pydantic@v2.7.1...v2.7.3)

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

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

requirements.txt

@@ -26,7 +26,7 @@ pgpy==0.6.0
 plumbum==1.8.3
 psycopg2-binary==2.9.9
 pydantic-settings==2.2.1
-pydantic==2.7.1
+pydantic==2.7.3
 python-multipart>=0.0.7
 sentry-sdk[fastapi]==2.2.1  # requires FastAPI>=0.79.0
 syncer==2.0.3