Phase 6.1: Unit Tests for Foundation Modules

[J-MaFf]

Write comprehensive unit tests for config, auth, api_client, and logger_config modules.

Deliverables

• test_config.py with config validation tests
• test_auth.py with authentication chain tests
• test_api_client.py with API client tests (mocked)
• test_logger_config.py with logging tests
• Mock external dependencies
• >80% code coverage for Phase 1 modules