network.cpp: include expected.h

src/core/internal_network/network.cpp

@@ -27,6 +27,7 @@
 
 #include "common/assert.h"
 #include "common/common_types.h"
+#include "common/expected.h"
 #include "common/logging/log.h"
 #include "common/settings.h"
 #include "core/internal_network/network.h"