Consolidate D&D prompt ordering tests

internal/modules/dnd/normalize/npcs/scriptorium_assets_test.go

@@ -54,12 +54,12 @@ func TestRegisterPromptAssetsPreparesNormalizationPrompt(t *testing.T) {
 			t.Errorf("message %d role = %q, want %q", index, prepared.Messages[index].Role, role)
 		}
 	}
-	for _, index := range []int{0, 2} {
+	for _, index := range []int{2, 4} {
 		if cache := prepared.Messages[index].CacheControl; cache == nil || cache.Type != scriptorium.CacheControlEphemeral {
 			t.Errorf("message %d cache control = %#v, want ephemeral", index, cache)
 		}
 	}
-	for _, index := range []int{1, 3, 4} {
+	for _, index := range []int{0, 1, 3} {
 		if cache := prepared.Messages[index].CacheControl; cache != nil {
 			t.Errorf("message %d cache control = %#v, want nil", index, cache)
 		}