v3.2.1: Marks BaseEntity as a MappedSuperclass
Marks the `BaseEntity` as a Doctrine `MappedSuperclass`. This change allows other entities to inherit from it without `BaseEntity` being managed as a standalone entity in the database.
Marks the `BaseEntity` as a Doctrine `MappedSuperclass`. This change allows other entities to inherit from it without `BaseEntity` being managed as a standalone entity in the database.