The Atlanta Opera’s production of Richard Wagner’s Siegfried debuted this past Saturday, and things are officially getting serious. Last seen in the land of the peach under the auspices of the Metropolitan Opera tour in April 28, 1917 (a performance which also forced the farewell of the celebrated Johanna Gadski for her assumed political improprieties) Siegfried is the third installment in Wagner’s monumental tetralogy: Der Ring des Nibelungen, and it presents tremendous challenges to any company tasked with bringing the work to life.…