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- Add `log_level` setting to config.py (default: INFO, env: LOG_LEVEL) - Configure Python root logger in main.py with standard precedence: LOG_LEVEL explicit > DEBUG=true implies DEBUG > default INFO - Add timestamp to log format for production readability - Suppress noisy third-party loggers at DEBUG level - Add comprehensive debug logging to all auth functions - Add LOG_LEVEL/DEBUG to .env.demo and ConfigurationGuide.md - Add tests for logging config and auth debug output Co-authored-by: christianlouis <361235+christianlouis@users.noreply.github.com>