function sendTelegramMessage(int|string $chatId, string $text, ?array $replyMarkup = null): void
{
    $config = appConfig();
    $url = "https://api.telegram.org/bot{$config['8758737407:AAH-u7j-mOCDayZVcO776E23iw1kh4Q0sgs']}/sendMessage";

    $payload = [
        'chat_id' => $chatId,
        'text'    => $text,
    ];

    if ($replyMarkup !== null) {
        $payload['reply_markup'] = json_encode($replyMarkup);
    }

    $options = [
        'http' => [
            'header'  => "Content-type: application/x-www-form-urlencoded\r\n",
            'method'  => 'POST',
            'content' => http_build_query($payload),
            'timeout' => 15,
        ]
    ];

    $result = file_get_contents($url, false, stream_context_create($options));

    file_put_contents(
        __DIR__ . '/send-debug.txt',
        date('Y-m-d H:i:s') . " URL: " . $url . "\nPAYLOAD: " . print_r($payload, true) . "\nRESULT: " . print_r($result, true) . "\n\n",
        FILE_APPEND
    );
}