Probe every domain every minute, and keep it out of its own traffic numbers

NPM's access log only describes hosts somebody visited; the host most likely to be quietly broken
is the one nobody does. Probes carry a User-Agent npm_access_stats.sh drops — unmarked, this
monitor would be fifty thousand requests a day in the very logs it reports on.

Plugin/unraid/include/scheduler.php

@@ -189,6 +189,10 @@ function vv_cron_rebuild(array $schedule): bool {
     foreach ([
         ['* * * * *',   'api_cache_writer.sh'],
         ['0 */2 * * *', 'remote_arr_cache_writer.sh'],
+        // Every minute, and it gates itself on UPTIME_PROBE_ENABLED rather than being removed from
+        // here when switched off — a cron entry that appears and disappears is harder to reason
+        // about than one that always exists and sometimes exits immediately.
+        ['* * * * *',   'uptime_probe.sh'],
     ] as [$cron, $script]) {
         $path = "$toolsDir/$script";
         if (file_exists($path)) $lines[] = "$cron bash \"$runner\" \"Plugin/unraid/Tools/$script\" \"$path\"";