Additional UDEV rule may lead to race with udevil mount rule. Better extent the systemd udevil unit with a drop-in.
To fsck any ext4 file system (and only ext4 fs's) to mount create with path:
Code: /storage/.config/system.d/[email protected]/fsck.conf
[Service]
ExecStartPre=-/usr/sbin/fsck -T -M -p -t ext4 %I
Edit: '-' added to ignore error codes