refactor: decouple application startup logic from main

session/lifecycle/lifecycle.go

@@ -123,12 +123,8 @@ func (l *lifecycle) Close() error {
 	l.sessionRegistry.Remove(key)
 
 	if tunnelType == types.TunnelTypeTCP {
-		if err := l.PortRegistry().SetStatus(l.forwarder.ForwardedPort(), false); err != nil {
-			errs = append(errs, err)
-		}
-		if err := l.forwarder.Close(); err != nil {
-			errs = append(errs, err)
-		}
+		errs = append(errs, l.PortRegistry().SetStatus(l.forwarder.ForwardedPort(), false))
+		errs = append(errs, l.forwarder.Close())
 	}
 
 	l.closeErr = errors.Join(errs...)

session/session.go

@@ -195,7 +195,6 @@ func (s *session) waitForSessionEnd() error {
 	}
 
 	if err := s.lifecycle.Close(); err != nil {
-		log.Printf("failed to close session: %v", err)
 		return err
 	}
 	return nil