Avoid repeated warm request dispatch work

src/wasm/worker.cpp

@@ -973,6 +973,7 @@ public:
 	std::optional<wasmtime::Module> core_module;
 	std::optional<wasmtime::Linker> core_linker;
 	std::unique_ptr<wasmtime_instance_pre_t, WasmInstancePreDeleter> core_instance_pre;
+	DValue server_config_context;
 	struct CoreImport
 	{
 		String module;