- Renamed `has_or_had_auxiliary_entities` to `is_or_was_associated_with` in DigitalPlatform.yaml to align with naming conventions.
- Updated examples in DigitalPlatform.yaml to reflect new slot names and types.
- Migrated `has_av_equipment` to `has_or_had_equipment` in EducationCenter.yaml, including detailed descriptions and examples.
- Consolidated archival references by migrating `archival_reference` to `has_or_had_identifier` in InformationCarrier.yaml.
- Removed deprecated slots: `has_authority_file_name`, `has_authority_file_url`, `has_auxiliary_place`, `has_auxiliary_place_type`, `has_auxiliary_platform`, `has_auxiliary_platform_type`, and `has_av_equipment`, archiving their definitions.
- Updated slot fixes to reflect the migration of various slots to more generic or appropriate counterparts, ensuring all changes are documented with processing notes.
