Message Data
constructor(id: MessageId, clientKey: ULong, deliveryCursor: String? = null, conversationId: ConversationId, topic: String, senderInboxId: InboxId, sentAt: Timestamp, insertedAt: Timestamp, expiresAt: Timestamp?, kind: MessageKind, deliveryStatus: DeliveryStatus, rawBytes: ByteArray, contentType: ContentTypeId?, fallback: String?, encoded: EncodedContent?, content: MessageContent, replyCount: ULong, reactions: List<ReactionMessage>, inReplyTo: ReplyParent?)