docs: third-pass overlap consolidation and guide scoping

documentation/GUIDE__AE_Events_Onsite_Runbook.md

@@ -9,6 +9,10 @@ This guide covers the human-centric logistics and "In the Heat of the Moment" su
 Aether badge printing uses the browser's native `window.print()` — no special software or print
 server needed.
 
+This runbook keeps badge guidance concise for onsite flow. For detailed printer/browser setup,
+driver notes, and troubleshooting matrix, use:
+`documentation/GUIDE__AE_Events_Badges_Onsite.md`.
+
 ### Kiosk Station Setup
 - **Browser:** Use **Chrome (Chromium)** for all kiosk stations.
 - **Settings:** Set Margins to **None**. Enable **Background Graphics**.