In November, the Boston Symphony Orchestra’s 2023–24 season will be marked by the Ligeti 100 festival from Nov. 12 to 19, celebrating the 100th anniversary of György Ligeti’s birth. Ligeti, a pivotal 20th-century composer, faced significant challenges, from wartime hardships to Soviet-era censorship. He gained widespread recognition, particularly for his music featured in the film “2001: A Space Odyssey.” On {…}