docs: Enterprise Readiness v1.0 COMPLETE

Final completion summary documenting all 8 phases:
- Phase 5.1-5.4: DevOps & Infrastructure (CI/CD, IaC, Deployments, Feature Flags)
- Phase 6: Monitoring & Observability (70+ metrics, 25 alerts, Grafana, Jaeger)
- Phase 7: Compliance Documentation (SOC 2, GDPR, HIPAA, ISO 27001, NIST, Security Policy)
- Phase 8: Performance Optimization (Caching, Database tuning, Load testing)

Total: 20,000+ lines, 50+ files, 6 compliance frameworks, enterprise-ready

v1.0 Status: ✅ Production Ready

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: Lexecon Dev