add: contract create serializer, TODO: fix errors with owners create and test

core/apps/contracts/models/owners.py

@@ -19,7 +19,7 @@ from core.apps.contracts.validators.owners import (
 )
 
 
-class LegalEntityModel(UUIDPrimaryKeyBaseModel):
+class LegalEntityModel(UUIDPrimaryKeyBaseModel): 
     name = models.CharField(
         _("Name"), 
         validators=[
@@ -104,7 +104,7 @@ class IndividualModel(UUIDPrimaryKeyBaseModel):
     )
 
     iin_code = models.CharField(
-        _("IIN code"),
+        _("IIN code"), 
         max_length=14,
         validators=[
             iin_code_validator,