Summary

Use unified KCENON_* feature detection for source_location and jthread in logger_system.

5W1H Specification

• Who: logger_system maintainers
• What: Replace LOGGER_HAS_* detection with KCENON_HAS_*
• Where: error_handling_utils.h, jthread_compat.h
• When: TBD
• Why: Standardize detection logic across repos
• How: Include feature_flags header and rely on KCENON_*

Parent Issue

kcenon/common_system#223

Tasks

• Include feature_flags.h in detection headers
• Replace LOGGER_HAS_SOURCE_LOCATION / LOGGER_HAS_JTHREAD usage
• Keep LOGGER_HAS_* only as legacy aliases (migration flag)

Acceptance Criteria

• jthread/source_location detection matches common_system
• LOGGER_HAS_* only exists as compatibility aliases