update streamlit app to take outputs from 2 models and visualise spans

[rory-hurley-gds]

Summary

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Checklists

This pull/merge request meets the following requirements:

• [ ] code runs
• [ ] developments are ethical and secure
• [ ] you have made proportionate checks that the code works correctly
• [ ] test suite passes
• [ ] developments adhere to AQA plan (see docs/aqa/aqa_plan.md)
• [ ] data log updated (see docs/aqa/data_log.md), if necessary
• [ ] assumptions, and caveats log updated (see docs/aqa/assumptions_caveats.md), if necessary
• [ ] minimum usable documentation written in the docs folder

Comments have been added below around the incomplete checks.

[exfalsoquodlibet]

Thanks @rory-hurley-gds. Could you freeze the requirements-original.txt to requirements.txt and commit both files?

Before doing this, ensure your environment is aligned to remote main (beside the new "protobuf" package you're adding now). I mean, ensure you are not freezing any other unnecessary package local to you perhaps because of experimentation but unnecessary to the project.

pip freeze -r  requirements-original.txt > requirements.txt

Hopefully, there'll be no conflict.