Pass immutable run-state snapshot to onTriggeredRun

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

packages/ai/src/chatTransport.test.ts

@@ -809,7 +809,7 @@ describe("TriggerChatTransport", function () {
       onTriggeredRun: async function onTriggeredRun(state) {
         await sleep(1);
         observedRunId = state.runId;
-        observedState = { ...state };
+        observedState = state;
         callbackCompleted = true;
       },
     });

packages/ai/src/chatTransport.ts

@@ -177,7 +177,9 @@ export class TriggerChatTransport<
 
     if (this.onTriggeredRun) {
       try {
-        await this.onTriggeredRun(runState);
+        await this.onTriggeredRun({
+          ...runState,
+        });
       } catch {
         // Ignore callback errors so chat streaming can continue.
       }