feat(scheduler): dispatch event on job failure, notify admins via notifications module

Add ?ModuleEventDispatcher to SchedulerRunService (fail-open, nullable).
Dispatch scheduler.job_failed event when a job fails with payload:
job_id, job_key, label, error_code, error_message, trigger_type.

New SchedulerJobFailedNotificationListener in notifications module
creates in-app admin notifications for users with JOBS_MANAGE
permission, scoped per tenant, with 30-min dedup per job_key.

Also fixes audit module manifest: system_audit_purge job_key was
mismatched (audit_system_purge vs system_audit_purge in DB).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

lib/Service/Scheduler/SchedulerServicesFactory.php

@@ -3,6 +3,7 @@
 namespace MintyPHP\Service\Scheduler;
 
 use MintyPHP\App\AppContainer;
+use MintyPHP\App\Module\ModuleEventDispatcher;
 use MintyPHP\Repository\Scheduler\ScheduledJobRepositoryInterface;
 use MintyPHP\Repository\Scheduler\ScheduledJobRunRepositoryInterface;
 use MintyPHP\Repository\Scheduler\SchedulerRuntimeRepositoryInterface;
@@ -47,7 +48,8 @@ class SchedulerServicesFactory
             $this->getScheduledJobRegistry(),
             $this->getScheduleCalculator(),
             $this->getDatabaseSessionRepository(),
-            $this->getAuditRecorder()
+            $this->getAuditRecorder(),
+            $this->getEventDispatcher()
         );
     }
 
@@ -99,4 +101,13 @@ class SchedulerServicesFactory
         return $this->auditRecorder;
     }
 
+    private function getEventDispatcher(): ?ModuleEventDispatcher
+    {
+        if ($this->appContainer->has(ModuleEventDispatcher::class)) {
+            $dispatcher = $this->appContainer->get(ModuleEventDispatcher::class);
+            return $dispatcher instanceof ModuleEventDispatcher ? $dispatcher : null;
+        }
+
+        return null;
+    }
 }