fix(beszel): prevent live subscription memory growth (#6448)

* fix(beszel): bound live stats subscriptions

* fix(beszel): avoid blocking subscription teardown

* fix(import): map new clock options

packages/old-import/src/widgets/options.ts

@@ -65,6 +65,9 @@ const optionMapping: OptionMapping = {
     useCustomTimezone: () => true,
     customTimeFormat: () => undefined,
     customDateFormat: () => undefined,
+    showWeather: () => undefined,
+    weatherLocation: () => undefined,
+    isWeatherFormatFahrenheit: () => undefined,
   },
   downloads: {
     activeTorrentThreshold: (oldOptions) =>