Premier Giorgia Meloni expressed satisfaction on Wednesday after the Senate unanimously approved a bill establishing a national day, May 3, to remember Italian journalists who have been killed while doing their jobs.     She named a list of such journalists, including Peppino Impastato, who was killed by Cosa Nostra in 1978, RAI reporter Ilaria Alpi and her cameraman Miran Hrovatin, who were murdered in Mogadishu in 1994 while they were working on a report into weapons and waste trafficking,