Configuration System

class FieldsConfig(models.Model):
    """
    Field visibility and behavior configuration per entity type.

    Attributes:
    - content_type: ContentType, entity type
    - descriptions: JSONField, field configuration data
    
    Methods:
    - is_field_hidden(field_name): Check if field is hidden
    - is_field_required(field_name): Check if field is required
    """

class CustomEntityType(models.Model):
    """
    Custom entity type definition for business-specific entities.

    Attributes:
    - name: str, entity type name
    - plural_name: str, plural form
    - generate_pk: bool, auto-generate primary keys
    """