Document setting conversation priority on the update endpoint (Preview)

[Apexinsideapex]

Why?

Conversation priority can be read through the API but there was no documented way to set it, so integrations that triage conversations in their own tooling had nothing to write back to.

How?

Documents the priority level and an optional attribution field on the Preview update-conversation request body.

Notes for reviewers

• Affected versions: Preview only. No dated version (2.15 or earlier) changes.
• fern check reports the same 3 errors as clean main (pre-existing duplicate declarations in the preview articles and conversation-attributes files); this change introduces none.
• Local Redocly preview was not run — CI is the render signal here.
• Companions:
  • intercom/intercom#556305
  • intercom/developer-docs#1093

_{Generated with Claude Code}