feat(ui): store workflow in generation tab images

[psychedelicious]

Summary

Stores the workflow for generation tab images in the image. There's one glaring issue - if using dynamic prompts or multiple iterations, the workflow will be for only one of the permutations.

Related Issues / Discussions

QA Instructions

Merge Plan

Checklist

• [ ] The PR has a short but descriptive title, suitable for a changelog
• [ ] Tests added / updated (if applicable)
• [ ] Documentation added / updated (if applicable)