Migrated data integration - Feature validation (Group 1 onboarding)

> _This issue was auto-created as part of the Zenhub sub-issues migration. The original entity was opened on 2025-05-02. For more details see [this post](https://changelog.zenhub.com/migration-of-epics-projects-to-sub-issues-313645?zenhub_entity_id=Z2lkOi8vcmFwdG9yL1plbmh1YkVwaWMvMjI5OTYx)._

This epic involves testing the integration of features and workflows with the migrated data from the legacy system to the Modernized BR.

As we continue migrating additional data from the legacy system, there is a risk that differences in the newly migrated data may impact existing functionality. While core features were tested and verified with migrated data during Early Adopters stage in the https://app.zenhub.com/workspaces/entities---olga-65af15f59e89f5043c2911f7/issues/gh/bcgov/entity/26989, the characteristics of the new data sets may expose edge cases or issues not previously encountered.

The goal is to ensure that both the data migration and feature functionality work together smoothly to provide a fully integrated system.