TDLN Core v2.0.0

First stable release of TDLN protocol implementation.

Highlights:
- Complete semantic operator suite
- 36 passing tests with comprehensive coverage
- OOM protection and safety guarantees
- Production-ready runtime
- Extensive documentation and examples

Performance:
- Deterministic canonicalization via Blake3
- Safe matrix operations (max 10,000x10,000)
- Zero-copy policy evaluation where possible

Breaking changes: None (initial release)