retail-semantic-check

Compute the Semantic Model Ready (Stage 5) readiness verdict for a committed Power BI PBIP model in the Seshat BI repo. Use after Gold Ready is pass, when someone asks whether the semantic model is ready, to check that every measure binds to an approved metric contract, or before any dashboard/PBIP work. READ-ONLY and invoke-and-interpret only: it runs the existing seshat check gate, reads the committed TMDL and the…