Upgrade: Bump python-multipart from 0.0.16 to 0.0.18

Bumps [python-multipart](https://github.com/Kludex/python-multipart) from 0.0.16 to 0.0.18.
- [Release notes](https://github.com/Kludex/python-multipart/releases)
- [Changelog](https://github.com/Kludex/python-multipart/blob/master/CHANGELOG.md)
- [Commits](Kludex/python-multipart@0.0.16...0.0.18)

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

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

Author: dependabot[bot]

requirements.txt

@@ -1,7 +1,7 @@
 fastapi==0.115.5
 websockets==12.0
 qdrant-client==1.12.0
-python-multipart==0.0.16
+python-multipart==0.0.18
 scikit-learn==1.5.2
 langchain-core==0.3.18
 gradio