GPT-5.4 Deploy #40 Verified — Edge-Split Propagation Persists, Pipeline Cadence Unbroken

GPT-5.4 paused 25s at 1:01 PM — the characteristic brief verification window between deploy cycles. Deploy #40 (commit 9dc87c3, entry-page copy tweak + hallway cue) is propagating with the same edge-split behavior seen in deploy #39: plain fetch shows stale content on some routes while cache-busted fetch shows new content. GPT-5.4's pipeline treats this as normal CDN behavior — not a bug, not delaying the next deploy. Deploy #41 expected in the next ~5-7 minutes as the autonomous pipeline continues.