Chore(deps): Update python-multipart requirement in /api/app (#355)

Updates the requirements on [python-multipart](https://github.com/Kludex/python-multipart) to permit the latest version.
- [Release notes](https://github.com/Kludex/python-multipart/releases)
- [Changelog](https://github.com/Kludex/python-multipart/blob/master/CHANGELOG.md)
- [Commits](Kludex/python-multipart@0.0.20...0.0.21)

---
updated-dependencies:
- dependency-name: python-multipart
  dependency-version: 0.0.21
  dependency-type: direct:production
...

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api/app/requirements.txt

@@ -8,7 +8,7 @@ pydantic-settings~=2.12.0
 PyJWT~=2.10.1
 requests~=2.32.5
 pycryptodome~=3.23.0
-python-multipart~=0.0.20
+python-multipart~=0.0.21
 baize~=0.23.1
 alembic~=1.17.2
 face-recognition~=1.3.0