fix: stream close in agent connection

hub/internal/service/connection_manager/agent.go

@@ -44,22 +44,23 @@ func (a *AgentConnection) Listen() error {
 	go a.listenHeartbeat(heartbeatsChan)
 	defer close(heartbeatsChan)
 
+	defer func() {
+		err := a.Close()
+		if err != nil {
+			a.log.Warn().Err(err).Msg("failed stream close")
+		}
+	}()
+
 	for {
 		select {
 		case <-a.ctx.Done():
-			err := a.stream.Close()
-			if err != nil {
-				a.log.Warn().Err(err).Msg("failed stream close")
-			}
 			return a.ctx.Err()
 		default:
 			agentEvent, err := a.stream.Recv()
 			if err == io.EOF {
-				a.cancel()
 				return nil
 			}
 			if err != nil {
-				a.cancel()
 				return fmt.Errorf("stream: %w", err)
 			}
 
@@ -141,3 +142,8 @@ func (a *AgentConnection) Execute(ctx context.Context, request domainHub.AgentRe
 		return response, nil
 	}
 }
+
+func (a *AgentConnection) Close() error {
+	a.cancel()
+	return a.stream.Close()
+}