Carry optional prompt labels through results

internal/domain/smoke_diagnostics_test.go

@@ -77,11 +77,15 @@ func TestCloneSmokeTestReportOwnsMutableValues(t *testing.T) {
 	reachable := true
 	status := 200
 	wait := 3 * time.Millisecond
+	promptVersion := "v1"
 	report := SmokeTestReport{
 		Applicable: &applicable,
-		Target: SmokeTestTarget{EffectiveSettings: ExecutionTarget{
-			ExtraParams: map[string]any{"nested": map[string]any{"value": "original"}},
-		}},
+		Target: SmokeTestTarget{
+			PromptVersion: &promptVersion,
+			EffectiveSettings: ExecutionTarget{
+				ExtraParams: map[string]any{"nested": map[string]any{"value": "original"}},
+			},
+		},
 		Facts: SmokeTestFacts{EndpointReachable: &reachable},
 		Attempts: []SmokeTestAttempt{{
 			HTTPStatus: &status,
@@ -99,9 +103,10 @@ func TestCloneSmokeTestReportOwnsMutableValues(t *testing.T) {
 	*cloned.Attempts[0].HTTPStatus = 503
 	*cloned.Attempts[0].Facts.EndpointReachable = false
 	*cloned.Attempts[0].Timing.CapacityWait = time.Second
+	*cloned.Target.PromptVersion = "changed"
 	cloned.Target.EffectiveSettings.ExtraParams["nested"].(map[string]any)["value"] = "changed"
 
-	if !applicable || !reachable || status != 200 || wait != 3*time.Millisecond {
+	if !applicable || !reachable || status != 200 || wait != 3*time.Millisecond || promptVersion != "v1" {
 		t.Fatal("cloned report shared optional scalar pointers")
 	}
 	if got := report.Target.EffectiveSettings.ExtraParams["nested"].(map[string]any)["value"]; got != "original" {