🏛 Ch.27 — Golden Architecture (E₈ in the World) [Lane D] · refs #30

# Ch.27 — Golden Architecture

**Part**: VI | **Lane**: D | **Refs**: #30 · #63

## Rule of Three
1. Core — E₈ appearances across physics
2. Sacred — 248-dim structure
3. Philosophy — unity across scales
4. Empirical — string theory, bosonic lattices
5. Image — E₈ Coxeter projection

## Acceptance
- [ ] ≥8 pages | `Closes #91`