Expand ai package changelog with transport capabilities

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

Author: cursoragent

packages/ai/CHANGELOG.md

@@ -8,3 +8,6 @@
 - Added `ai.tool(...)` and `ai.currentToolOptions()` helpers for AI SDK tool ergonomics.
 - Added `TriggerChatTransport` / `createTriggerChatTransport(...)` for AI SDK `useChat()` integrations powered by Trigger.dev tasks and Realtime Streams v2.
 - Added rich default chat payload typing (`chatId`, `trigger`, `messageId`, `messages`, request context) and mapper hooks for custom payloads.
+- Added support for async payload mappers, async trigger option resolvers, and async `onTriggeredRun` callbacks.
+- Added support for tuple-style header input normalization and typing.
+- Added reconnect lifecycle handling that cleans run state after completion/error and gracefully returns `null` when reconnect cannot be resumed.