Fix all ruff linting errors

- Fix import formatting in test_ingest.py (remove extra blank line)
- Fix generate_marketing_screenshots.py:
  - Remove trailing whitespace and blank line whitespace (77 auto-fixes)
  - Use ternary operator for image mode check
  - Replace bare except with Exception
  - Split long function signature and calls
  - Remove unused variable text_area_width

Author: pH-7