fix: avoid shadowing of 'err' in CLI options, YAML store, and external plugin helpers

Replaced short variable declarations with assignments in pkg/cli/options.go,
pkg/config/store/yaml/store.go, and pkg/plugins/external/helpers.go to avoid shadowing
the outer 'err' variable. These changes improve error traceability and follow Go best
practices for scoped variable reuse and readability.

Author: kersten

pkg/cli/options.go

@@ -203,7 +203,7 @@ func getPluginsRoot(host string) (pluginsRoot string, err error) {
 	// if user provides specific path, return
 	if pluginsPath := os.Getenv("EXTERNAL_PLUGINS_PATH"); pluginsPath != "" {
 		// verify if the path actually exists
-		if _, err := os.Stat(pluginsPath); err != nil {
+		if _, err = os.Stat(pluginsPath); err != nil {
 			if os.IsNotExist(err) {
 				// the path does not exist
 				return "", fmt.Errorf("the specified path %s does not exist", pluginsPath)

pkg/config/store/yaml/store.go

@@ -89,7 +89,7 @@ func (s *yamlStore) LoadFrom(path string) error {
 
 	// Check the file version
 	var versioned versionedConfig
-	if err := yaml.Unmarshal(in, &versioned); err != nil {
+	if err = yaml.Unmarshal(in, &versioned); err != nil {
 		return store.LoadError{Err: fmt.Errorf("unable to determine config version: %w", err)}
 	}
 

pkg/plugins/external/helpers.go

@@ -127,7 +127,7 @@ func getUniverseMap(fs machinery.Filesystem) (map[string]string, error) {
 		}
 
 		defer func() {
-			if err := file.Close(); err != nil {
+			if err = file.Close(); err != nil {
 				return
 			}
 		}()