Add KeepAlive duration to IaR struct and update related functionality; remove obsolete test file

main.go

@@ -70,14 +70,14 @@ func main() {
 	// Start directory watcher in a goroutine
 	go watcher.WatchDirectory(ctx, config.Directory, eb, logger)
 
-	// Start keep-alive sender in a goroutine
-	go iar.ServeKeepAlive(ctx, 15*time.Minute)
-
 	err = iar.KeepAlive()
 	if err != nil {
 		slog.Error("Initial keep-alive failed", "error", err)
 	}
 
+	// Start keep-alive sender in a goroutine
+	go iar.ServeKeepAlive(ctx)
+
 	// Handle OS signals for shutdown
 	sigCh := make(chan os.Signal, 1)
 	signal.Notify(sigCh, syscall.SIGINT, syscall.SIGTERM)