feat(notifications): implement comprehensive telegram notifications for payment providers

- Add NotifyMe trait with centralized Telegram bot integration
  - Implement webhook notifications for Polar, OxaPay, and ActivationKey providers
  - Add subscription lifecycle notifications (create, activate, cancel, pause, resume)
  - Enhance Polar webhook processing with user context and error handling
  - Fix subscription.updated and subscription.canceled webhook column errors
  - Add idempotent webhook processing to prevent duplicate handling

app/NotifyMe.php

@@ -2,13 +2,13 @@
 
 namespace App;
 
-use Illuminate\Support\Facades\Log;
-use Illuminate\Support\Facades\Http;
 use Exception;
+use Illuminate\Support\Facades\Http;
+use Illuminate\Support\Facades\Log;
 
 trait NotifyMe
 {
-    public function sendTelegramNotification($message)
+    public function sendTelegramNotification($message): bool
     {
         $botToken = config('app.notify_tg_bot_token');
         $chatId = config('app.notify_tg_chat_id');
@@ -28,9 +28,7 @@ trait NotifyMe
         ];
 
         try {
-            $response = Http::post($url, $data);
-
-            return $response->successful();
+            return Http::post($url, $data)->successful();
         } catch (Exception $e) {
             Log::error('Failed to send Telegram notification: '.$e->getMessage());