Refactor Slack notification logic in departments_o.php and exampleRoute.php

- Update `send_webhook_message` to include custom department webhook.
- Add `sendSlackInternalStatisticNotification` to handle additional statistics notifications.

services/nginx/app/objects/departments_o.php

@@ -786,6 +786,6 @@ class departments_o extends db
         }
         // Send the message to the internal Slack webhook
         $slack = new slack();
-        $slack->send_message($tmp);
+        $slack->send_webhook_message($tmp, (new departments_o())->select(10)->slack_webhook->value());
     }
 }

services/nginx/app/routes/exampleRoute.php

@@ -39,8 +39,9 @@ class exampleRoute
                         // The time should be from 00:00:00 of the start date to 23:59:59 of the end date
                         $date_end = date('Y-m-d 23:59:59', strtotime("-1 days")); // Yesterday (Sunday) at 23:59:59
                         $date_start = date('Y-m-d 00:00:00', strtotime("-$days days")); // $days ago at 00:00:00
-                        $department->sendPeriodStatisticsToSlack($date_start, $date_end);
+                        $department->sendPeriodStatisticsToSlack($date_start, $date_end); // Sends message to "daglig-ledelse".
                     }
+                    $department->sendSlackInternalStatisticNotification($date_start, $date_end, $departments);
                 }
             }
             $response->success(['message' => 'Hello World!']);