Modules-repo runtime follow-up for the split core change validation-02-full-chain-engine. This issue owns only the bundle-side validation engine, command wiring, and runtime checks after the core report/evidence contract split.\n\nCounterpart core issue: nold-ai/specfact-cli#241\nTarget feature: #163
Modules-repo runtime follow-up for the split core change validation-02-full-chain-engine. This issue owns only the bundle-side validation engine, command wiring, and runtime checks after the core report/evidence contract split.\n\nCounterpart core issue: nold-ai/specfact-cli#241\nTarget feature: #163