relationship refactor

models/relationship.py

@@ -45,13 +45,13 @@ class Relationship(models.Model):
     )
 
     # FK
-    user_id_who = models.ForeignKey(
+    user_who = models.ForeignKey(
         get_user_model(),
         related_name="user_id_who",
         on_delete=models.DO_NOTHING,
         help_text="уникальный идентификатор инициатора договорных отношений"
     )
-    user_id_whom = models.ForeignKey(
+    user_whom = models.ForeignKey(
         get_user_model(),
         related_name="user_id_whom",
         on_delete=models.DO_NOTHING,