VideoRectangle labels do not save their rotation metadata in 1.21.0+

[anniepires]

Describe the bug
Creating rotated VideoRectangle labels in LabelStudio 1.21.0+ no longer retain/save their rotation data.
See the following example, running the heartexlabs/label-studio:1.21.0 docker container:

Other image versions tried:

• locally built off the current version of label-studio/develop

To Reproduce
Steps to reproduce the behavior:

1. Spin up container, configure project - say with this config:

 <View>
    <Labels name="videoLabels" toName="video">
        <Label value="LabelClass" />
    </Labels>
    <Video name="video" value="$video" framerate="10" muted="true" />
    <VideoRectangle name="box" toName="video" smart="true" />
</View>

2. Create any rotated VideoRectangle label, then submit
3. Observe non-rotated video label upon refresh
4. Cry

Expected behavior:
Created VideoRectangle labels should save their input rotation, and be saved/presented as it was when it was rotated. See the following example, running the heartexlabs/label-studio:1.20.0 docker container:

Environment (please complete the following information):

• OS: [Docker] - Ran in arm/linux (mac) and amd/linux
• Label Studio Version: 1.21.0+

[anniepires]

It seems the 7d657d0 commit may be problematic. Building from this version does not save rotation, but building from commit bfec410 does.