blhc job: add artifact & use filter-output when output is too long

I have a blhc job for which the output of too long.

The log reports:

Job's log exceeded limit of 4194304 bytes.
Job execution will continue but no more output will be collected.

Would it be possible to filter this output like all other outputs with "filter-output"?

Moreover, in the end, there is no artifact where I could see the output of blhc