🎨(backend) use pylint error names instead of codes in disable comments

Replace pylint error codes with descriptive error names in disable comments
to make suppressed warnings explicit and improve code readability.

src/backend/core/api/serializers.py

@@ -1,6 +1,6 @@
 """Client serializers for the Meet core app."""
 
-# pylint: disable=W0223,E0611
+# pylint: disable=abstract-method,no-name-in-module
 
 from django.utils.translation import gettext_lazy as _