Fix Discord webhook URLs

app/Models/Flight.php

@@ -24,6 +24,7 @@ use Illuminate\Support\Collection;
  * @property Collection subfleets
  * @property int        days
  * @property int        distance
+ * @property int        planned_distance
  * @property int        flight_time
  * @property string     route
  * @property string     dpt_time

app/Notifications/Messages/Broadcast/NewsAdded.php

@@ -31,7 +31,8 @@ class NewsAdded extends Notification implements ShouldQueue
     public function toDiscordChannel($news): ?DiscordMessage
     {
         $dm = new DiscordMessage();
-        return $dm->success()
+        return $dm->url(setting('notifications.discord_public_webhook_url'))
+            ->success()
             ->title('News: '.$news->subject)
             ->author([
                 'name'     => $news->user->ident.' - '.$news->user->name_private,

app/Notifications/Messages/Broadcast/PirepFiled.php

@@ -64,7 +64,8 @@ class PirepFiled extends Notification implements ShouldQueue
         }
 
         $dm = new DiscordMessage();
-        return $dm->success()
+        return $dm->url(setting('notifications.discord_public_webhook_url'))
+            ->success()
             ->title($title)
             ->description($pirep->user->discord_id ? 'Flight by <@'.$pirep->user->discord_id.'>' : '')
             ->url(route('frontend.pireps.show', [$pirep->id]))

app/Notifications/Messages/Broadcast/PirepStatusChanged.php

@@ -110,7 +110,8 @@ class PirepStatusChanged extends Notification implements ShouldQueue
         }
 
         $dm = new DiscordMessage();
-        return $dm->success()
+        return $dm->url(setting('notifications.discord_public_webhook_url'))
+            ->success()
             ->title($title)
             ->description($pirep->user->discord_id ? 'Flight by <@'.$pirep->user->discord_id.'>' : '')
             ->url(route('frontend.pireps.show', [$pirep->id]))

app/Notifications/Messages/Broadcast/UserRegistered.php

@@ -49,7 +49,8 @@ class UserRegistered extends Notification implements ShouldQueue
     public function toDiscordChannel($notifiable): ?DiscordMessage
     {
         $dm = new DiscordMessage();
-        return $dm->success()
+        return $dm->url(setting('notifications.discord_private_webhook_url'))
+            ->success()
             ->title('New User Registered: '.$this->user->ident)
             ->author([
                 'name'     => $this->user->ident.' - '.$this->user->name_private,