Report update progress and log to Hammerhead while updating

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

cmd/blacktip/main.go

@@ -55,7 +55,11 @@ func main() {
 		Hammerhead: strings.TrimRight(*hh, "/"), Token: *token, TunnelAddr: *tun, DataDir: *data, Docker: *dockerOn,
 		Traefik: blacktip.TraefikConfig{Path: *traefikPath, ACMEDNS: *acmeDNS, NoACME: *noACME},
 		Version: version, AutoUpdate: *autoUpdate,
-		UpdateNow: func(ctx context.Context) (string, error) { return selfupdate.CheckOnce(ctx, upd) },
+		UpdateNow: func(ctx context.Context, progress func(string, int, string)) (string, error) {
+			c := upd
+			c.Progress = func(e selfupdate.Event) { progress(e.Stage, e.Pct, e.Line) }
+			return selfupdate.CheckOnce(ctx, c)
+		},
 	})
 	if err != nil {
 		log.Fatal(err)