Add outcome-first business assurance

[danielgaskins]

Summary

• add reviewed outcome contracts, invariants, budgets, and consequence metadata
• add business-readable assurance layers and five outcome-first mutations
• add zero-dependency audit-outcomes plus vendor-neutral enterprise demos
• add the Enterprise Outcome Golden Set with state-only 12/24 vs complete 24/24

Assurance

• 118 passed, 3 optional live-harness skips
• all four golden sets pass
• enterprise resource benchmark passes
• wheel and sdist build, metadata, clean-install, and demo assurance pass