- Split monolithic exitrace.sh into focused lib/ modules
- date_utils.sh: Date validation and generation functions
- mx_lookup.sh: MX record lookup functionality
- log_analyzer.awk: Core log analysis logic extracted from main script
- Maintains full backward compatibility with existing interface
- Improves maintainability, testability, and code organization
🤖 Generated with [Claude Code](https://claude.ai/code)
Co-Authored-By: Claude <noreply@anthropic.com>
