feat: simplify data and add cache to LocalFsAdapter

server/internal/adapters/fs_utils.go

@@ -3,10 +3,8 @@ package adapters
 import (
 	"errors"
 	"mime"
-	"os"
 	"path/filepath"
 	"strings"
-	"time"
 )
 
 func SafeRel(root, requested string) (string, error) {
@@ -37,20 +35,6 @@ func ResponsePath(root, full string) string {
 	return "/" + filepath.ToSlash(rel)
 }
 
-func sizeOrZero(fi os.FileInfo) int64 {
-	if fi == nil {
-		return 0
-	}
-	return fi.Size()
-}
-
-func modTimeOrZero(fi os.FileInfo) time.Time {
-	if fi == nil {
-		return time.Time{}
-	}
-	return fi.ModTime()
-}
-
 var textPlainExtensions = map[string]bool{
 	".txt":  true,
 	".log":  true,