[PROMOTE] 晉升 dev 至 demo 環境

1. [STYLE] 將 Discord 溫度過低告警側邊條顏色從預設藍色 (cyan-600) 調整為警示紅色 (rose-600)，以與溫度過高告警顏色保持警示一致性。

app/Services/Notification/DiscordWebhookService.php

@@ -99,7 +99,7 @@ class DiscordWebhookService
                 } elseif (str_contains($log->message, 'too low')) {
                     $title = '🔴 ' . $this->cleanTranslation(__('Temperature Alert (Low)'), $companyLocale);
                     $description = $this->cleanTranslation(__('Current temperature (:temp°C) is below the lower limit (:limit°C).', ['temp' => $temp, 'limit' => $limit]), $companyLocale);
-                    $color = 561586; // cyan-600
+                    $color = 14753096; // rose-600 (與過高告警一致使用紅色)
 
                     $fields[] = [
                         'name' => $this->cleanTranslation(__('Current Temperature'), $companyLocale),