Document no-reply conversation population on Reporting Data Export (Preview) (#544)

Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: neddinn

descriptions/0/api.intercom.io.yaml

@@ -3359,6 +3359,7 @@ paths:
   "/export/reporting_data/enqueue":
     post:
       summary: Enqueue a new reporting data export job
+      description: For the **conversation** dataset, from the Preview version this export returns all conversations, including those that never received a user reply. Earlier versions return only conversations that received at least one user reply. Other datasets are unaffected.
       tags: [Export]
       parameters:
       - name: Intercom-Version