Simplify user logging - always use name field

- Remove UUID fallback since name is always present
- Clean up conditional logic
- User name is a required field in the model

make_post_sell/models/crypto_payment.py

@@ -559,13 +559,8 @@ class CryptoPayment(RBase, Base):
 
         # Get user display name if available
         user_display = ""
-        if self.user:
-            if hasattr(self.user, "name") and self.user.name:
-                user_display = f" user:{self.user.name}"
-            else:
-                user_display = f" user:id-{self.user.uuid_str[:8]}"
-        elif self.user_id:
-            user_display = f" user:id-{self.user_id.hex[:8]}"
+        if self.user and hasattr(self.user, "name"):
+            user_display = f" user:{self.user.name}"
 
         # Get shop name if available
         shop_display = ""