Refactor Two Column to work with Delta Urls

[CarsonDavis]

Description

• Develop Two Column Code to work with Delta Urls
• Write test cases for paired field descriptor system for TDAMM tags that handles both manual and ML-generated tags.

Implementation Considerations

• Develop paired_field_descriptor that will automatically create two fields (ML and manual) once defined inside the BaseUrl model
• Write test cases with PyTest

Deliverable

All test cases implemented and passing:

• Test the relationship between manual and ML fields
• Test that manual field takes priority over ML field
• Test handling of empty arrays vs None
• Test deletion of fields
• Test handling of multiple tags
• Test that values persist after save
• Test that tags are preserved even after collection migration and promotion

Dependencies

No response