add: custom kpi and export log&cdr file

lib/file/file.go

@@ -0,0 +1,27 @@
+package file
+
+import (
+	"os"
+	"path/filepath"
+)
+
+func GetFileAndDirCount(dir string) (int, int, error) {
+	var fileCount, dirCount int
+
+	err := filepath.Walk(dir, func(path string, info os.FileInfo, err error) error {
+		if err != nil {
+			return err
+		}
+		if path == dir {
+			return nil // 跳过当前目录
+		}
+		if info.IsDir() {
+			dirCount++
+		} else {
+			fileCount++
+		}
+		return nil
+	})
+
+	return fileCount, dirCount, err
+}