fix: [worker:diagnostic] Prevent failing if no worker are running
fix: [worker:diagnostic] Prevent failing if no worker are running

MISP/MISP,MISP/MISP,SteveClement/MISP,SteveClement/MISP,SteveClement/MISP,MISP/MISP,MISP/MISP,SteveClement/MISP,MISP/MISP,SteveClement/MISP