# Issue

**Title:** `set_args` fails to interpret dot notation for nested arguments

## Description
When attempting to set arguments for nested configurations using dot notation with `set_args`, the values are not correctly applied to the intended nested paths. Instead, the system either creates a flat key using the full dot-separated string or fails to set the value at all. The expected behavior is for `set_args` to correctly parse the dot notation and set the value at the corresponding nested path within the configuration.

## Task

Modify the repository so that the issue described above is resolved. The task's test suite verifies your patch by applying it on top of the base commit `7a60ee1d0e8c` and running the modified tests.