A 32-year-old female veteran presents with comorbid PTSD related to military sexual trauma and moderate alcohol use disorder. She reports drinking 4 to 6 drinks nightly to manage intrusive memories and hyperarousal symptoms. She has been sober for 14 days after a brief detoxification. Her PCL-5 score is 58, and she endorses significant avoidance, nightmares, exaggerated startle response, and emotional numbing. She asks whether she needs to be sober longer before starting trauma therapy. What is the most appropriate treatment approach?