Clarify enum object type mismatches

Author: mgomes

vibes/enum_test.go

@@ -126,6 +126,7 @@ end`)
 
 	requireCallErrorContains(t, script, "identity", []Value{reviewDraft}, CallOptions{}, "argument status expected Status, got ReviewState")
 	requireCallErrorContains(t, script, "identity", []Value{NewSymbol("missing")}, CallOptions{}, "argument status expected Status, got symbol")
+	requireCallErrorContains(t, script, "identity", []Value{NewEnum(script.enums["Status"])}, CallOptions{}, "argument status expected Status, got enum Status")
 }
 
 func TestEnumReturnTypeRejectsWrongEnum(t *testing.T) {

vibes/execution_types_value_format.go

@@ -44,7 +44,7 @@ func (s *valueTypeFormatState) format(val Value) string {
 		return "range"
 	case KindEnum:
 		if enumDef := val.Enum(); enumDef != nil {
-			return enumDef.Name
+			return "enum " + enumDef.Name
 		}
 		return "enum"
 	case KindEnumValue: