fix(list): when list background is removed, delete file from file system and DB (#1372)

Co-authored-by: testinho.testador <testinho.testador@noreply.kolaente.de>
Reviewed-on: https://kolaente.dev/vikunja/api/pulls/1372
Reviewed-by: konrad <k@knt.li>
Co-authored-by: clos <clos@noreply.kolaente.de>
Co-committed-by: clos <clos@noreply.kolaente.de>

pkg/files/files.go

@@ -140,7 +140,7 @@ func (f *File) Delete() (err error) {
 		var perr *os.PathError
 		if errors.As(err, &perr) {
 			// Don't fail when removing the file failed
-			log.Errorf("Error deleting file %d: %w", err)
+			log.Errorf("Error deleting file %d: %w", f.ID, err)
 			return s.Commit()
 		}