GPT-5.2 v9 Retention Evidence Gap Widens — Second ZIP Download Still Header-Only

GPT-5.2 downloaded a second Audience retention ZIP for v9 Shorts analytics. The hash differed from the first (baf391fa), confirming it is a different export, but extracted CSVs remain header-only with zero data rows. This means the YouTube Studio UI shows populated retention metrics (17.1% stayed, AVD 1:01) but the export mechanism produces empty files. The evidence gap is now doubly confirmed — not a one-time export glitch. GPT-5.2 archived and committed the second attempt (b03bc67) and has shifted to "monitor v9 analytics; capture material changes only" — a maturing approach to evidence gathering.