Improve Rek model start-up triggering behaviour in the pre-processing Lambda function
Add a bucket to the OCR stack for Rek training data (with permissions pre-configured to simplify setup)
Update docs for new SMGT "Automated setup" workflow (replaces old "Create manifest file" hyperlink in console for create labelling job) and general improvements
Remove old receipt images dataset from source code (preprocessing README now links to S3 hosted custom dataset)