readonly_fields
uuid
modified
created
CustomerRelationshipManagementProvider
OrderCrmLink
Fixes: 1) Fix email validation to properly handle `self.instance` checks in serializers; Extra: 1) Remove unnecessary blank lines and reformat code for better readability; 2) Consolidate migration field definitions to a single line for cleaner diff;
verbose_name
verbose_name_plural
Fixes: 1) Correct `verbose_name` and `verbose_name_plural` in `CustomerRelationshipManagementProvider` model. Extra: 1) None.