Extractor Improvements

[AndyRae]

Is this the right issue type?

• Yes, I'm planning work for this project team.

Summary

Some feedback on querybuilder progress;

Acceptance Criteria

• Dark mode
• Clean / tidy up code
• Tests
• Fix typing

Tasks

• Dark mode
• Clean / tidy up code
• Tests (Add worker unit tests, coverage)
• Fix Python worker types with Mypy (as best)
• Add casting of VARBINARY
• Add CI workflow on Push to Main (meaning change/add Release workflow)
• File upload (later)
• change the dialect flexibly (later)

Confirm creation

• This issue is ready