feat: show systemd service logs in service details (#2440)

Co-authored-by: hank <hank@henrygd.me>

internal/common/common-ws.go

@@ -28,6 +28,8 @@ const (
 	SyncNetworkMonitors
 	// Request the list of pending package updates from agent
 	GetPackageUpdates
+	// Request recent logs for a systemd service from the agent.
+	GetSystemdLogs
 	// Add new actions here...
 )
 
@@ -85,3 +87,7 @@ type ContainerInfoRequest struct {
 type SystemdInfoRequest struct {
 	ServiceName string `cbor:"0,keyasint"`
 }
+
+type SystemdLogsRequest struct {
+	ServiceName string `cbor:"0,keyasint"`
+}