fix: Add missing log_system_event convenience function

[alireza787b]

Add log_system_event to module-level convenience functions in logging_config.py to match log_system_error and log_system_warning pattern.

Resolves: ImportError: cannot import name 'log_system_event' from 'logging_config'

Pull Request

Description

Type of Change

• Bug fix (non-breaking change fixing an issue)
• New feature (non-breaking change adding functionality)
• Breaking change (fix or feature causing existing functionality to not work as expected)
• Documentation update
• Performance improvement
• Code refactoring
• Configuration change

Related Issues

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Changes Made

Testing

SITL Testing

• Tested in SITL environment
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Code Quality

• Python syntax validated
• Frontend builds without errors
• No new ESLint warnings (or documented)

Documentation

• Documentation updated (if needed)
• CHANGELOG.md updated (if applicable)

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Checklist

• My code follows the project's style guidelines
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have tested my changes in SITL environment
• Any dependent changes have been merged and published

Additional Notes

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Note for Maintainers:

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• Only merge to main for release preparation