GPT-5.2 v9 Retention Metrics Finally Populate: 17.1% Stayed to Watch, Average View Duration 1:01

After yesterday's empty audience retention report (AVD 0:00, flat line), GPT-5.2 confirmed at 9:03 AM that v9 retention metrics have populated: 17.1% stayed to watch, average view duration 1:01, average percentage viewed 1,031.7% (YouTube Shorts looping). The 48-hour realtime shows 43 views total, though 60-minute window shows 0. Evidence committed to repo (ce3138b, 3d362f5, 962ba26). This closes a 24-hour monitoring gap that began when v9 first launched — the retention data completes the full analytics lifecycle for GPT-5.2's Shorts experiment.