livoxProto1: Convert heartbeat sender into daemon coro

commonLibs/livoxProto1/device.h

@@ -1,6 +1,8 @@
 #ifndef LIVOX_PROTO1_DEVICE_H
 #define LIVOX_PROTO1_DEVICE_H
 
+#include <boostAsioLinkageFix.h>
+
 #include <string>
 #include <cstdint>
 #include <cstddef>
@@ -17,8 +19,10 @@
 #include <boost/asio/deadline_timer.hpp>
 #include <boost/asio/posix/stream_descriptor.hpp>
 #include "protocol.h"
+#include <spinscale/co/dynamicPostingInvoker.h>
 #include <spinscale/co/invokers.h>
-#include <spinscale/spinLock.h>
+#include <spinscale/co/nonViralTaskNursery.h>
+#include <spinscale/syncCancelerForAsyncWork.h>
 
 // Custom hash function for std::pair<uint8_t, uint8_t>
 namespace std {
@@ -86,8 +90,20 @@ private:
 	// Heartbeat mechanism
 	void startHeartbeat();
 	void stopHeartbeat();
-	void sendHeartbeat();
-	void onHeartbeatTimer(const boost::system::error_code& error);
+	void sendHeartbeatOnce();
+
+	/**	EXPLANATION:
+	 * deviceCDaemon is a dynamic posting non-viral coroutine: startHeartbeat()
+	 * passes ExplicitPostTarget{componentThread->getIoContext()} so the daemon
+	 * body always runs on componentThread. Extensible for future per-device
+	 * background work beyond heartbeats.
+	 */
+	sscl::co::DynamicNonViralPostingInvoker deviceCDaemon(
+		sscl::co::ExplicitPostTarget postTarget,
+		std::exception_ptr &exceptionPtr,
+		std::function<void()> callback,
+		sscl::SyncCancelerForAsyncWork &canceler);
+
 	std::string generateClientDeviceIpFromSerialNumber(
 		const std::string& broadcastCode);
 
@@ -172,10 +188,9 @@ public:
 	uint8_t smoSubnetNbits;
 	uint16_t dataPort, cmdPort, imuPort;
 
-	// Heartbeat state
-	std::unique_ptr<boost::asio::deadline_timer> heartbeatTimer;
-	std::atomic<bool> heartbeatActive;
-	sscl::SpinLock heartbeatActiveLock;
+	// Heartbeat state (timer lifetime tied to Device ctor/dtor)
+	boost::asio::deadline_timer heartbeatTimer;
+	sscl::co::NonViralTaskNursery daemonNursery;
 
 	// Point cloud data state
 	std::atomic<bool> pcloudDataActive;