ExFairness v0.2.0 - Production-Ready Fairness Library

- 4 fairness metrics (Demographic Parity, Equalized Odds, Equal Opportunity, Predictive Parity)
- Legal compliance detection (EEOC 80% rule)
- Reweighting mitigation technique
- Comprehensive reporting (Markdown/JSON export)
- 134 tests, 100% passing
- ~8,300+ lines of documentation
- 27+ academic citations
- GPU-accelerated via Nx.Defn
- Zero warnings, zero errors

- Comprehensive technical documentation (4,449 new lines)
- Expanded README with mathematical foundations (660 → 1,437 lines)
- Complete roadmap to v1.0.0 (future_directions.md)
- Implementation analysis (implementation_report.md)
- Testing strategy documentation (testing_and_qa_strategy.md)
- Contribution guidelines (CONTRIBUTING.md)
- 27+ research citations with DOI numbers

Ready for immediate use in production applications with:
- Legal compliance features
- Comprehensive validation
- Helpful error messages
- Type safety (Dialyzer)
- Comprehensive testing