- Migrated `was_generated_by` to `is_or_was_generated_by` and `was_derived_from` to `is_or_was_derived_from` across multiple YAML schema files as per Rule 53.
- Updated relevant imports, slot lists, and slot usage keys to reflect the new naming conventions.
- Added migration comments for clarity and tracking.
- Introduced a migration script to automate the changes across all affected files.
