With this season opening concert — a journey from France to Russia and back again — the CSO will rejoice with music to honor our much-anticipated return to the audience-filled concert hall. There may be no better sound to usher in a celebratory homecoming than with Hector Berlioz’s rousing, colorful Roman Carnival Overture. It has become one of the French Romantic composer’s most frequently performed works since its 1844 Paris premiere.   Sergei Rachmaninoff’s Rhapsody on a Theme of Paganini…