`requirements.txt` Pulls Latest SDK Causing Version Conflicts with Label Studio

[yuka-with-data]

I ran into a version conflict when setting up the ML backend.

Problem:
The requirements.txt currently has:

label-studio-sdk @ git+https://github.com/HumanSignal/label-studio-sdk.git

This pulls the latest SDK from Git (currently 2.0.19).

label-studio 1.23.0 expects label-studio-sdk==2.0.18.

This causes pip dependency warnings and may confuse developers trying to run the backend locally.

Optional note for developers:

Developers running examples outside Docker may encounter import or CLI issues if SDK versions are mismatched.

Suggested fix:

Pin label-studio-sdk in requirements.txt to a compatible version (e.g., 2.0.18) or document the version compatibility clearly.

I’d be happy to contribute a PR updating requirements.txt and improving the notes for developers if that’s helpful.