fix: [API] Handle multiple event IDs being queries or not using the event ID filter when generating the CSV output file names
fix: [API] Handle multiple event IDs being queries or not using the event ID filter when generating the CSV output file names

SteveClement/MISP,SteveClement/MISP,SteveClement/MISP,FloatingGhost/MISP,Rafiot/MISP,MISP/MISP,FloatingGhost/MISP,FloatingGhost/MISP,MISP/MISP,Rafiot/MISP,devnull-/MISP,Rafiot/MISP,SteveClement/MISP,FIRSTdotorg/MISP,devnull-/MISP,Rafiot/MISP,MISP/MISP,FIRSTdotorg/MISP,MISP/MISP,SteveClement/MISP,FIRSTdotorg/MISP,devnull-/MISP,FIRSTdotorg/MISP,MISP/MISP,devnull-/MISP,FloatingGhost/MISP