[Quality] Unresolved critical PR comment was merged into main and should have been addressed

A mutable 'config' argument breaks platform consistency. It is better to keep data changes at a single, direct entry point. At the same time, binding this function directly to 'Config' type limits future extensibility. A trait-based generic would preserve the same flow while allowing extended mutable config types later.

_Originally posted by @morozow in #15722_