feat(watchlist): the ClubLog expedition enrichment — phase 2 lands

clublog.org/watch.php, per entry: the DXpedition flag, OQRS, LiveStream, the
log's QSO total and the last-24h rate — the fields the schema has carried since
phase 1. Refreshed on DXHunter's own cadence (hourly for expeditions,
six-hourly for the rest), two at a time with a breath between requests: the
application API key is shared by every install, so a hundred-entry list must
read as a trickle at ClubLog's end. Nothing to configure — OpsLog's own key,
already used for cty and Most Wanted, serves.

A starred pattern is asked about by its base (ClubLog has no log for VK9*).
The card gains the 24h rate beside the QSO total and the Live link to the
expedition's stream.

app.go

@@ -1398,6 +1398,7 @@ func (a *App) startup(ctx context.Context) {
 	// POTA: background poller of api.pota.app so cluster spots can be tagged
 	// when the DX station is currently activating a park. Best-effort.
 	a.pota = pota.New(func(format string, args ...any) { applog.Printf(format, args...) })
+	a.startWatchlistClubLog()
 	a.watchPattern.Store(strings.ToUpper(strings.TrimSpace(a.settingOr(keyWatchlistContestPattern, ""))))
 	go a.pota.Run(a.ctx)