Note phase-aware onError reporting in ai changelog

Co-authored-by: Eric Allam <eric@trigger.dev>

Author: cursoragent

packages/ai/CHANGELOG.md

@@ -13,3 +13,4 @@
 - Added reconnect lifecycle handling that cleans run state after completion/error and gracefully returns `null` when reconnect cannot be resumed.
 - Added explicit helper option types for chat send/reconnect request inputs.
 - Added optional `onError` callback support for observing non-fatal transport issues.
+- Added phase-aware `onError` reporting across send, reconnect, and stream-consumption paths.