fix: zero-value fallback — integer→0, boolean→false; modify uses WithDefaults

provider/internal/core/client.go

@@ -332,6 +332,12 @@ func normalizeUniversalValueV6(val string, param universalCfsParam) string {
 	if strings.Contains(dataType, "map") || strings.Contains(dataType, "json") || strings.Contains(nameHint, "map") || strings.Contains(nameHint, "json") {
 		return "{}"
 	}
+	if strings.Contains(dataType, "integer") || strings.Contains(dataType, "int") {
+		return "0"
+	}
+	if strings.Contains(dataType, "boolean") || strings.Contains(dataType, "bool") {
+		return "false"
+	}
 
 	return trimmed
 }

provider/internal/resources_core/crud.go

@@ -58,7 +58,7 @@ func UpdateResourceWithTimeout(ctx context.Context, client *core.UniversalClient
 	if err != nil {
 		return err
 	}
-	return client.RunInstanceOperationUniversal(ctxWithTimeout, instanceID, "modify", params)
+	return client.RunInstanceOperationUniversalWithDefaults(ctxWithTimeout, instanceID, "modify", params)
 }
 
 // DeleteResource runs destroy behavior (suspend/state-only) for instance resources.