LeadResponseDto

{
    "id": "507f1f77bcf86cd799439011",
    "channel_id": "550e8400-e29b-41d4-a716-446655440001",
    "channel_type": "vk",
    "external_user_id": "12345",
    "first_name": "Иван",
    "last_name": "Иванов",
    "username": "@ivan",
    "avatar_url": "https://vk.com/avatar.jpg",
    "is_subscribed": true,
    "is_blocked": false,
    "is_blacklisted": false,
    "blacklisted_at": "2025-12-14T14:00:00Z",
    "blacklist_reason": "Спам",
    "lead_source": "group_join",
    "lead_type": "user",
    "language_code": "ru",
    "created_at": "2025-12-14T12:00:00Z",
    "updated_at": "2025-12-14T12:30:00Z",
    "last_interaction_at": "2025-12-14T12:25:00Z",
    "unsubscribed_at": "2025-12-14T13:00:00Z",
    "last_profile_sync_at": "2025-12-14T14:00:00Z"
}