Variable ARTIFACT_SECTIONSConst

Canonical ordering. Order matches the plan:

1. Executive brief 2. Synthesis 3. Significance 4. Actors & forces
2. Coalitions 6. Stakeholders 7. PESTLE 8. Economic
3. Risk 10. Threat 11. Scenarios 12. Continuity
4. Deep analysis 14. Documents 15. Extended 16. MCP audit
5. Quality & reflection.