Verdi daemon workers may consume all the RAM easily

[blokhin]

Feb 13 02:49:07 aiida-rev-6 kernel: [34883.362978] Out of memory: Kill process 27658 (verdi) score 31 or sacrifice child
Feb 13 02:49:07 aiida-rev-6 kernel: [34883.364805] Killed process 27658 (verdi) total-vm:1542612kB, anon-rss:507184kB, file-rss:0kB, shmem-rss:0kB
Feb 13 02:49:07 aiida-rev-6 kernel: [34883.404285] oom_reaper: reaped process 27658 (verdi), now anon-rss:0kB, file-rss:0kB, shmem-rss:0kB

this leads to a total disaster 😭