return metadatas and conversations in job results. Consume them in Slack connector to use attachments in responses

core/agent/jobs.go

@@ -23,10 +23,11 @@ type Job struct {
 type JobResult struct {
 	sync.Mutex
 	// The result of a job
-	State    []ActionState
-	Response string
-	Error    error
-	ready    chan bool
+	State        []ActionState
+	Conversation []openai.ChatCompletionMessage
+	Response     string
+	Error        error
+	ready        chan bool
 }
 
 type JobOption func(*Job)