docs: transform README to enterprise-grade technical specification
- Remove all emojis and informal language
- Add comprehensive technical architecture diagrams
- Include detailed data flow visualizations
- Add security architecture and governance models
- Provide enterprise adoption guidance
- Include performance benchmarks and requirements
- Add Kubernetes-native deployment specifications
- Document multi-region architecture patterns
- Specify protocol support matrix
- Define observability framework with KPIs
This positions OSSA as a serious open standard suitable for adoption by enterprise organizations including Google, GitLab, and other tech giants.