fix: describe REST HttpResponse result handling

Symptom: describe emitted `returns String` for REST call actions backed by ResultHandlingHttpResponse. Re-executing that MDL rebuilt the output variable as a string, so later `$Response/StatusCode` and `$Response/Content` expressions failed Mendix consistency checks.

Root cause: the REST call formatter handled string, mapping, and none result handlers, but fell through to String for HttpResponse result handling.

Fix: format ResultHandlingHttpResponse as `returns response`, matching the existing parser/builder syntax for full HTTP response variables.

Tests: added a REST formatter regression that asserts HttpResponse result handling roundtrips as `returns response`.

Author: hjothamendix

mdl/executor/cmd_microflows_format_action.go

@@ -922,6 +922,8 @@ func formatRestCallAction(ctx *ExecContext, a *microflows.RestCallAction) string
 		case *microflows.ResultHandlingString:
 			sb.WriteString("String")
 			_ = rh // used for type assertion only
+		case *microflows.ResultHandlingHttpResponse:
+			sb.WriteString("response")
 		case *microflows.ResultHandlingMapping:
 			sb.WriteString("mapping ")
 			sb.WriteString(string(rh.MappingID))

mdl/executor/cmd_microflows_format_restcall_test.go

@@ -31,6 +31,20 @@ func TestFormatRestCallAction_GET(t *testing.T) {
 	assertContains(t, got, "returns String")
 }
 
+func TestFormatRestCallAction_HttpResponse(t *testing.T) {
+	e := newTestExecutor()
+	action := &microflows.RestCallAction{
+		HttpConfiguration: &microflows.HttpConfiguration{
+			HttpMethod:       microflows.HttpMethodGet,
+			LocationTemplate: "https://api.example.com/orders",
+		},
+		ResultHandling: &microflows.ResultHandlingHttpResponse{VariableName: "Response"},
+	}
+	got := e.formatRestCallAction(action)
+	assertContains(t, got, "$Response = ")
+	assertContains(t, got, "returns response")
+}
+
 func TestFormatRestCallAction_POST_CustomBody(t *testing.T) {
 	e := newTestExecutor()
 	action := &microflows.RestCallAction{