chore(deps): update pydantic requirement from <3,>=2 to >=2.13.3,<3 (#66)

Updates the requirements on [pydantic](https://github.com/pydantic/pydantic) to permit the latest version.
- [Release notes](https://github.com/pydantic/pydantic/releases)
- [Changelog](https://github.com/pydantic/pydantic/blob/main/HISTORY.md)
- [Commits](pydantic/pydantic@v2.0...v2.13.3)

---
updated-dependencies:
- dependency-name: pydantic
  dependency-version: 2.13.3
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

requirements.txt

@@ -1,7 +1,7 @@
 fastapi>=0.136.0,<1
 uvicorn[standard]>=0.45.0,<1
 httpx>=0.28.1,<1
-pydantic>=2,<3
+pydantic>=2.13.3,<3
 pydantic-settings>=2.14.0,<3
 slowapi>=0.1,<1
 python-dotenv>=1.2.2,<2