As I write this review of Puccini’s “La bohème at the Lyric Opera of Chicago, I can’t take my eyes of the Chicago Sun-Times’ headline from earlier this week: “Lyric musicians walk.”Members of the Lyric’s orchestra who are members of the Chicago Federation of Musicians are protesting the reduction of the orchestra size from 74 to 64 players and the length of the season from 24 to 22 weeks representing — equivalent to an 8 percent reduction in pay — as well as other cuts …