[lib] add scheduler to node context

- also update test setup & access point in denial of service test

src/node/context.cpp

@@ -8,6 +8,7 @@
 #include <interfaces/chain.h>
 #include <net.h>
 #include <net_processing.h>
+#include <scheduler.h>
 
 NodeContext::NodeContext() {}
 NodeContext::~NodeContext() {}