Make the background job time-sensitive so cron actually runs it

The job was registered but never executed: `background-job:list` kept
showing last_run = 1970-01-01. It was marked TIME_INSENSITIVE, and
OC\Core\Service\CronService::runCli() reads `maintenance_window_start` and
calls jobList->getNext($onlyTimeSensitive = true) whenever the current UTC
hour is outside [start, start+4] -- so with a maintenance window configured,
time-insensitive jobs are skipped for the other 20 hours of the day.

A job whose entire purpose is a 5-minute (now configurable down to 60s)
reaction time is time-sensitive by definition.

Also fix the occ invocation in README.md and CLAUDE.md: background-job:worker
takes job classes, not an app id, so the documented
`background-job:worker workflow_deck_automation` matched nothing.

lib/BackgroundJob/RunWorkflowsJob.php

@@ -35,7 +35,14 @@ class RunWorkflowsJob extends TimedJob {
 		// changed config.php takes effect on the next pass — no occ command
 		// and no re-registration of the job needed.
 		$this->setInterval(self::resolveInterval($config));
-		$this->setTimeSensitivity(IJob::TIME_INSENSITIVE);
+		// Must stay TIME_SENSITIVE. If `maintenance_window_start` is set in
+		// config.php — and Nextcloud's admin overview actively nags admins
+		// to set it — CronService only picks up TIME_INSENSITIVE jobs during
+		// those 4 hours and skips them for the rest of the day. A job whose
+		// whole point is a 5-minute (configurable down to 60s) reaction time
+		// would then run a handful of times per night and look completely
+		// dead in between.
+		$this->setTimeSensitivity(IJob::TIME_SENSITIVE);
 		$this->setAllowParallelRuns(false);
 	}