-- PHASE-1-SHADOW-RUN / REQ-EXEC-001
-- Bind a client-selected model identity to the server-side approved VersionSet.
ALTER TABLE governance.model_version_registry
    ADD COLUMN IF NOT EXISTS model_id uuid;

CREATE INDEX IF NOT EXISTS ix_model_version_registry_model_scope_effective
    ON governance.model_version_registry (model_id, scope_key, effective_at desc)
    WHERE model_id IS NOT NULL;