Refactor code for improved readability and maintainability; add utility functions for score calculation and archive processing

cmd/discover/main.go

@@ -11,14 +11,13 @@ import (
 	"github.com/0x524a/onvif-go/discovery"
 )
 
+const defaultDiscoveryTimeout = 10 * time.Second
+
 func main() {
 	iface := flag.String("interface", "", "Network interface to use (e.g., en0, en11)")
-	timeout := flag.Duration("timeout", 10*time.Second, "Discovery timeout")
+	timeout := flag.Duration("timeout", defaultDiscoveryTimeout, "Discovery timeout")
 	flag.Parse()
 
-	ctx, cancel := context.WithTimeout(context.Background(), *timeout)
-	defer cancel()
-
 	opts := &discovery.DiscoverOptions{
 		NetworkInterface: *iface,
 	}
@@ -29,9 +28,13 @@ func main() {
 	}
 	fmt.Println("...")
 
+	ctx, cancel := context.WithTimeout(context.Background(), *timeout)
+	defer cancel()
+
 	devices, err := discovery.DiscoverWithOptions(ctx, *timeout, opts)
 	if err != nil {
 		fmt.Fprintf(os.Stderr, "Discovery error: %v\n", err)
+		cancel()
 		os.Exit(1)
 	}