added TELEGRAM_PROXY functionality

.env

 TELEGRAM_DSN=telegram://bot_token@default?channel=channel_id
 ###< symfony/telegram-notifier ###
 
+TELEGRAM_PROXY=
+
 TELEGRAM_BOT_TOKEN=
 TELEGRAM_CHAT_ID=
 

config/services.yaml

         arguments:
             $telegramBotToken: '%env(TELEGRAM_BOT_TOKEN)%'
             $telegramChatId: '%env(TELEGRAM_CHAT_ID)%'
+            $httpClient: '@App\Service\TelegramHttpClient'
+
+    App\Service\TelegramHttpClient:
+        factory: ['Symfony\Component\HttpClient\HttpClient', 'create']
+        arguments:
+            - proxy: '%env(TELEGRAM_PROXY)%'
 
     App\Presentation\PortfolioPresenter:
         arguments:

src/Service/TelegramNotifier.php

 use Symfony\Component\Notifier\Chatter;
 use Symfony\Component\Notifier\Bridge\Telegram\TelegramOptions;
 use Symfony\Component\Notifier\Message\ChatMessage;
+use Symfony\Contracts\HttpClient\HttpClientInterface;
 
 readonly class TelegramNotifier
 {
-    public function __construct(private string $telegramBotToken, private string $telegramChatId)
-    {
+    public function __construct(
+        private string $telegramBotToken,
+        private string $telegramChatId,
+        private HttpClientInterface $httpClient,
+    ) {
     }
 
     public function notify(string $message, ?string $filename = null): void
     {
-        $telegramTransport = new TelegramTransport($this->telegramBotToken, $this->telegramChatId);
+        $telegramTransport = new TelegramTransport(
+            $this->telegramBotToken,
+            $this->telegramChatId,
+            $this->httpClient,
+        );
         $chatter = new Chatter($telegramTransport);
         $chatMessage = new ChatMessage($message);