Only send Matrix notification on priority escalation, not title updates

Title changes (e.g. rising Power_On_Hours counter) were firing a Matrix
ping every hour. Notifications now only trigger when priority escalates
to a higher severity level.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

create_ticket_api.php

@@ -265,15 +265,19 @@ if ($existing) {
                 ['reason' => 'auto-updated by hwmonDaemon (condition worsened)']
             ));
 
+            // Only notify on priority escalation — title-only updates (e.g. rising
+            // Power_On_Hours counter) should not generate a Matrix ping every hour.
+            if (isset($changes['priority'])) {
                 require_once __DIR__ . '/helpers/NotificationHelper.php';
                 NotificationHelper::sendTicketNotification($existingId, [
                     'title'    => $title,
-                'priority' => $newPriority < $existingPriority ? $newPriority : $existingPriority,
+                    'priority' => $changes['priority']['to'],
                     'category' => $category,
                     'type'     => $type,
                     'status'   => $existingStatus,
                 ], 'automated');
             }
+        }
 
         $conn->close();
         echo json_encode([