Require explicit manifest schemas

internal/manifest/manifest_test.go

@@ -69,6 +69,17 @@ func TestStageMarkHelpers(t *testing.T) {
 	}
 }
 
+func TestEnsureAnalyzeStageStartsWithCurrentAuthority(t *testing.T) {
+	now := time.Date(2026, 5, 3, 12, 0, 0, 0, time.UTC)
+	m := New("2026-05-03", now)
+	m.MarkStageRunning("analyze", now)
+
+	stage := m.Stages["analyze"]
+	if stage == nil || stage.AnalyzeStateVersion != AnalyzeStateContractVersion || stage.AnalyzeArtifacts == nil {
+		t.Fatalf("analyze stage = %#v, want initialized current authority", stage)
+	}
+}
+
 func TestMarkStageRunningClearsPriorCompletionErrorAndResultDetails(t *testing.T) {
 	m := New("2026-05-03", time.Date(2026, 5, 3, 10, 0, 0, 0, time.UTC))