Last scrub date and result

[Gandalf Corvotempesta <gandalf.corvotempesta@xxxxxxxxx>]

Would be possible to add, in mdadm --detail output, the date of last
scrub and it's result ?
Looking through logs is not always possible (and much more harder to
script something), having something like:

Update Time : Mon Jan  6 12:47:29 2020
          State : clean
Last scrub Time: Mon Jan  4 12:47:29 2020
Last scrub result: success

would be great!