Как вставить комментарии из Битрикса в письмо?

У меня есть класс который я использую в системе

<?php

use Bitrix\Main\EventManager;
use Bitrix\Crm\DealTable;
use Bitrix\Main\Mail\Event;


class UnifiedWindowQualityRating {



    const UNIFIED_WINDOW_CATEGORY_ID = 16;
    const STAGE_SUCCESS = 'C16:EXECUTING';
    const FIELD_CODE_RATING = 'UF_CRM_QUALITY_RATING';
    const FIELD_CODE_RATED = 'UF_CRM_QUALITY_RATED';

    public static function init() {
        $event_manager = EventManager::getInstance();
        $event_manager->addEventHandler('crm', 'OnAfterCrmDealUpdate', [self::class, 'on_deal_update']);
        $event_manager->addEventHandler('crm', 'OnBeforeCrmDealUpdate', [self::class, 'on_before_deal_update']);
    }

    public static function on_before_deal_update(&$ar_fields) {
        if (!empty($ar_fields['ID']) && isset($ar_fields['STAGE_ID'])) {
            $deal_id = $ar_fields['ID'];
            $current_stage = self::get_current_stage($deal_id);
            if ($current_stage) {
                $GLOBALS['QUALITY_RATING_OLD_STAGE_' . $deal_id] = $current_stage;
            }
        }
    }

    public static function on_deal_update($ar_fields) {
        if (empty($ar_fields['ID'])) {
            return;
        }

        $deal_id = $ar_fields['ID'];
        $old_stage = self::get_old_stage($deal_id, $ar_fields);
        $new_stage = $ar_fields['STAGE_ID'] ?? self::get_current_stage($deal_id);

        if ($old_stage && $new_stage && $old_stage !== self::STAGE_SUCCESS && $new_stage === self::STAGE_SUCCESS) {
            self::process_deal($deal_id);
        }

    }

    private static function get_old_stage($deal_id, $ar_fields) {
        if (isset($GLOBALS['QUALITY_RATING_OLD_STAGE_' . $deal_id])) {
            $old_stage = $GLOBALS['QUALITY_RATING_OLD_STAGE_' . $deal_id];
            unset($GLOBALS['QUALITY_RATING_OLD_STAGE_' . $deal_id]);
            return $old_stage;
        }

        if (isset($ar_fields['STAGE_ID_OLD'])) {
            return $ar_fields['STAGE_ID_OLD'];
        }

        return self::get_current_stage($deal_id);
    }

    private static function get_current_stage($deal_id) {
        try {
            $deal_data = DealTable::getById($deal_id)->fetch();
            return $deal_data['STAGE_ID'] ?? '';
        } catch (Exception $e) {
            return '';
        }
    }

    private static function process_deal($deal_id) {
        if (!self::acquire_lock($deal_id)) {
            return;
        }

        try {
            sleep(1);
            $deal_data = DealTable::getById($deal_id)->fetch();
            if (!$deal_data) {
                return;
            }

            if (!self::check_conditions($deal_data)) {
                return;
            }

            self::send_email($deal_data);

        } catch (Exception $e) {
        } finally {
            self::release_lock($deal_id);
        }
    }

    private static function acquire_lock($deal_id) {
        $lock_file = $_SERVER['DOCUMENT_ROOT'] . "/upload/tmp/quality_lock_{$deal_id}";
        $lock_dir = dirname($lock_file);
        if (!is_dir($lock_dir)) {
            mkdir($lock_dir, 0755, true);
        }
        $fp = @fopen($lock_file, 'x');
        if ($fp) {
            fclose($fp);
            return true;
        }
        return false;
    }

    private static function release_lock($deal_id) {
        $lock_file = $_SERVER['DOCUMENT_ROOT'] . "/upload/tmp/quality_lock_{$deal_id}";
        if (file_exists($lock_file)) {
            unlink($lock_file);
        }
    }

    private static function check_conditions($deal_data) {
        if (!self::is_unified_window_deal($deal_data)) {
            return false;
        }
        if (!self::is_correct_stage($deal_data)) {
            return false;
        }
        if (!self::is_not_sent($deal_data)) {
            return false;
        }
        if (!self::has_email($deal_data)) {
            return false;
        }
        return true;
    }

    public static function is_unified_window_deal($deal_data) {
        return isset($deal_data['CATEGORY_ID']) && $deal_data['CATEGORY_ID'] == self::UNIFIED_WINDOW_CATEGORY_ID;
    }

    private static function is_correct_stage($deal_data) {
        return isset($deal_data['STAGE_ID']) && $deal_data['STAGE_ID'] === self::STAGE_SUCCESS;
    }

    private static function is_not_sent($deal_data) {
        return empty($deal_data[self::FIELD_CODE_RATED]);
    }

    private static function has_email($deal_data) {
        return !empty(self::get_initiator_email($deal_data));
    }

    private static function get_last_comment($deal_id, $limit=5){
        $comments = [];

        $activityResult = CCrmActivity::GetList(
            ['CREATED' => 'DESC'],
            [
                'BINDING_ENTITY_TYPE_ID' => CCrmOwnerType::Deal,
                'BINDING_ENTITY_ID' => $deal_id,
                'TYPE_ID' => CCrmActivityType::Provider,
                'PROVIDER_ID' => 'CRM_COMMENT'
            ],
            false,
            false,
            ['ID', 'DESCRIPTION']
        );

        $count = 0;
        while ($activity = $activityResult->Fetch()) {
            if (!empty($activity['DESCRIPTION']) && $count < $limit) {
                $comments[] = $activity['DESCRIPTION'];
                $count++;
            }
        }

        return $comments;

    }



    public static function send_email($deal_data) {
        $deal_id = $deal_data['ID'];
        $email = self::get_initiator_email($deal_data);

        if (empty($email)) {
            return false;
        }

        $deal_url = self::get_deal_url($deal_id);
        $rating_token = self::generate_rating_token($deal_id);

        $excellent_url = self::get_rating_url_excellent($deal_id, $rating_token);
        $poor_url = self::get_rating_url_poor($deal_id, $rating_token);

        $comments = self::get_last_comment($deal_id);
        $last_comments_html = '';
        foreach ($comments as $comment) {
            $last_comments_html .= "<p><em>" . htmlspecialchars($comment) . "</em></p>";
        }

        $subject = 'Оценка качества выполненной работы';

        $html_message = "
            <p>Ваша заявка \"<strong>{$deal_id} - {$deal_data['TITLE']}</strong>\" выполнена, оцените качество работы.</p>
            <p>Последние комментарии: </p>
            {$last_comments_html}
            <p>Ссылка на заявку: <a href='{$deal_url}'>{$deal_url}</a></p>
            <div style='margin: 20px 0;'>
                <a href='{$excellent_url}' target='_blank' style='background-color: #4CAF50; color: white; padding: 10px 20px; text-decoration: none; margin-right: 10px; border-radius: 4px;'>Отлично</a>
                <a href='{$poor_url}' target='_blank' style='background-color: #f44336; color: white; padding: 10px 20px; text-decoration: none; border-radius: 4px;'>Неудовлетворительно</a>
            </div>
            <p style='color: #666; font-size: 12px;'>Оценку можно поставить только один раз</p>
        ";

        $html_message = mb_convert_encoding($html_message, 'UTF-8', 'auto');

        $email_fields = [
            "EVENT_NAME" => "CRM_QUALITY_RATING",
            "LID" => "s1",
            "C_FIELDS" => [
                "EMAIL_TO" => $email,
                "SUBJECT" => $subject,
                "BODY" => $html_message,
            ],
        ];

        $send_result = Event::send($email_fields);

        if ($send_result) {
            $update_fields = [
                self::FIELD_CODE_RATED => 1
            ];

            $deal_object = new CCrmDeal(false);
            $update_result = $deal_object->update($deal_id, $update_fields);

            if ($update_result) {
//                self::add_timeline_comment($deal_id, "Отправлено письмо с запросом оценки качества на email: {$email}");
                return true;
            }
        }
        return false;


    }

    public static function get_initiator_email($deal_data) {
        $email_fields = ['UF_CRM_EMAIL_FROM_REQUEST', 'UF_CRM_EMAIL', 'UF_CRM_CONTACT_EMAIL', 'EMAIL'];
        foreach ($email_fields as $field) {
            if (!empty($deal_data[$field])) {
                return $deal_data[$field];
            }
        }

        if (!empty($deal_data['CONTACT_ID'])) {
            $multi_fields = CCrmFieldMulti::GetList(
                ['ID' => 'asc'],
                ['ENTITY_ID' => 'CONTACT', 'ELEMENT_ID' => $deal_data['CONTACT_ID']]
            );

            while ($field = $multi_fields->Fetch()) {
                if ($field['TYPE_ID'] === 'EMAIL' && !empty($field['VALUE'])) {
                    return $field['VALUE'];
                }
            }
        }

        return '';
    }

    private static function get_deal_url($deal_id) {
        return \Bitrix\Main\Config\Option::get('main', 'site_addr', '') . "/crm/deal/details/{$deal_id}/";
    }

    private static function generate_rating_token($deal_id) {
        $salt = \Bitrix\Main\Config\Option::get('main', 'server_uniq_id', '');
        return md5($deal_id . $salt . date('Y-m-d'));
    }

    private static function get_rating_url_excellent($deal_id, $rating_token) {
        $base_url = \Bitrix\Main\Config\Option::get('main', 'site_addr', '');
        return $base_url . "/local/integrat/quality_assesment/excellent.php?deal_id={$deal_id}&token={$rating_token}";
    }

    private static function get_rating_url_poor($deal_id, $rating_token) {
        $base_url = \Bitrix\Main\Config\Option::get('main', 'site_addr', '');
        return $base_url . "/local/integrat/quality_assesment/poor.php?deal_id={$deal_id}&token={$rating_token}";
    }

    public static function save_rating_direct($rating_value, $deal_id, $token) {
        try {
            if (self::verify_rating_token($deal_id, $token)) {
                $deal_data = DealTable::getById($deal_id)->fetch();

                if ($deal_data && self::is_unified_window_deal($deal_data) && empty($deal_data[self::FIELD_CODE_RATED])) {
                    $rating_enum_id = self::get_rating_enum_id($rating_value);

                    if ($rating_enum_id) {
                        $deal_object = new CCrmDeal(false);
                        $update_fields = [
                            self::FIELD_CODE_RATING => $rating_enum_id,
                            self::FIELD_CODE_RATED => 1
                        ];
                        $deal_object->Update($deal_id, $update_fields);

                        $rating_text = ($rating_value === 'excellent') ? 'Отлично' : 'Неудовлетворительно';
                        self::add_timeline_comment($deal_id, "Оценка качества: {$rating_text}");
                    }
                }
            }
        } catch (Exception $e) {
        }
    }

    private static function get_rating_enum_id($rating_value) {
        $rating_text = ($rating_value === 'excellent') ? 'Отлично' : 'Неудовлетворительно';

        $user_field = CUserTypeEntity::GetList([], [
            'ENTITY_ID' => 'CRM_DEAL',
            'FIELD_NAME' => self::FIELD_CODE_RATING
        ])->Fetch();

        if (!$user_field) {
            return false;
        }

        $enum_values = [];
        $enum_res = CUserFieldEnum::GetList([], [
            'USER_FIELD_ID' => $user_field['ID']
        ]);

        while ($enum = $enum_res->Fetch()) {
            $enum_values[$enum['VALUE']] = $enum['ID'];
        }

        return $enum_values[$rating_text] ?? false;
    }

    private static function verify_rating_token($deal_id, $rating_token) {
        $salt_value = \Bitrix\Main\Config\Option::get('main', 'server_uniq_id', '');
        $expected_token = md5($deal_id . $salt_value . date('Y-m-d'));
        $yesterday_token = md5($deal_id . $salt_value . date('Y-m-d', strtotime('-1 day')));
        return $rating_token === $expected_token || $rating_token === $yesterday_token;
    }

    private static function add_timeline_rating($deal_id){
        if(isset($ar_fields['FIELDS'][self::FIELD_CODE_RATING])) {
            $deal_id = $ar_fields['ID'];
            $rating = $ar_fields['FIELDS'][self::FIELD_CODE_RATING];
            self::add_timeline_comment($deal_id, "Оценка качества была поставлена: {$rating}");
        }
    }

//    private static function add_timeline_comment($deal_id, $comment_text) {
//        $arFields = [
//            'ENTITY_TYPE' => 'DEAL',
//            'ENTITY_ID' => $deal_id,
//            'COMMENT' => $comment_text,
//            'AUTHOR_ID' => 1,
//        ];
//
//
//        $comment_id = CCrmTimelineComment::Add($arFields);
//
//
//        if ($comment_id) {
//            return true;
//        }
//
//        return false;
//    }
}

UnifiedWindowQualityRating::init();

Конкретно у меня вопросы к части кода

private static function get_last_comment($deal_id, $limit=5){
        $comments = [];

        $activityResult = CCrmActivity::GetList(
            ['CREATED' => 'DESC'],
            [
                'BINDING_ENTITY_TYPE_ID' => CCrmOwnerType::Deal,
                'BINDING_ENTITY_ID' => $deal_id,
                'TYPE_ID' => CCrmActivityType::Provider,
                'PROVIDER_ID' => 'CRM_COMMENT'
            ],
            false,
            false,
            ['ID', 'DESCRIPTION']
        );

        $count = 0;
        while ($activity = $activityResult->Fetch()) {
            if (!empty($activity['DESCRIPTION']) && $count < $limit) {
                $comments[] = $activity['DESCRIPTION'];
                $count++;
            }
        }

        return $comments;

    }



    public static function send_email($deal_data) {
        $deal_id = $deal_data['ID'];
        $email = self::get_initiator_email($deal_data);

        if (empty($email)) {
            return false;
        }

        $deal_url = self::get_deal_url($deal_id);
        $rating_token = self::generate_rating_token($deal_id);

        $excellent_url = self::get_rating_url_excellent($deal_id, $rating_token);
        $poor_url = self::get_rating_url_poor($deal_id, $rating_token);

        $comments = self::get_last_comment($deal_id);
        $last_comments_html = '';
        foreach ($comments as $comment) {
            $last_comments_html .= "<p><em>" . htmlspecialchars($comment) . "</em></p>";
        }

        $subject = 'Оценка качества выполненной работы';

        $html_message = "
            <p>Ваша заявка \"<strong>{$deal_id} - {$deal_data['TITLE']}</strong>\" выполнена, оцените качество работы.</p>
            <p>Последние комментарии: </p>
            {$last_comments_html}
            <p>Ссылка на заявку: <a href='{$deal_url}'>{$deal_url}</a></p>
            <div style='margin: 20px 0;'>
                <a href='{$excellent_url}' target='_blank' style='background-color: #4CAF50; color: white; padding: 10px 20px; text-decoration: none; margin-right: 10px; border-radius: 4px;'>Отлично</a>
                <a href='{$poor_url}' target='_blank' style='background-color: #f44336; color: white; padding: 10px 20px; text-decoration: none; border-radius: 4px;'>Неудовлетворительно</a>
            </div>
            <p style='color: #666; font-size: 12px;'>Оценку можно поставить только один раз</p>
        ";

        $html_message = mb_convert_encoding($html_message, 'UTF-8', 'auto');

        $email_fields = [
            "EVENT_NAME" => "CRM_QUALITY_RATING",
            "LID" => "s1",
            "C_FIELDS" => [
                "EMAIL_TO" => $email,
                "SUBJECT" => $subject,
                "BODY" => $html_message,
            ],
        ];

        $send_result = Event::send($email_fields);

        if ($send_result) {
            $update_fields = [
                self::FIELD_CODE_RATED => 1
            ];

            $deal_object = new CCrmDeal(false);
            $update_result = $deal_object->update($deal_id, $update_fields);

            if ($update_result) {
//                self::add_timeline_comment($deal_id, "Отправлено письмо с запросом оценки качества на email: {$email}");
                return true;
            }
        }
        return false;


    }

Письмо приходит на почту но последние комментарии в нем не отображаются пробовал использовать разные классы не помогает