fix: maintain correct import formatting structure

Ensure three-block import organization:
1. Standard library imports
2. Third-party imports
3. Project internal imports

This maintains consistency with project formatting standards.

Author: john

metadata/integration_test.go

@@ -19,15 +19,10 @@ package metadata_test
 
 import (
 	"testing"
-)
 
-import (
-	"github.com/stretchr/testify/assert"
-)
-
-import (
 	"dubbo.apache.org/dubbo-go/v3/common/constant"
 	"dubbo.apache.org/dubbo-go/v3/metadata"
+	"github.com/stretchr/testify/assert"
 )
 
 // TestJavaDubboIssueCompatibility tests functionality that resolves Java Dubbo 3.3.1 compatibility issues

metadata/java_dubbo_integration_test.go

@@ -19,15 +19,10 @@ package metadata_test
 
 import (
 	"testing"
-)
 
-import (
-	"github.com/stretchr/testify/assert"
-)
-
-import (
 	"dubbo.apache.org/dubbo-go/v3/common"
 	"dubbo.apache.org/dubbo-go/v3/metadata/info"
+	"github.com/stretchr/testify/assert"
 )
 
 // TestJavaDubboRevisionCompatibility tests Java Dubbo client revision compatibility