feat: Implement message delivered event handling to update message statuses in conversations.

src/types/messaging.ts

@@ -99,6 +99,13 @@ export interface MessagesReadEvent {
   readAt: string;
 }
 
+export interface MessageDeliveredEvent {
+  messageId?: string;
+  messageIds?: string[];
+  conversationId: string;
+  deliveredAt: string;
+}
+
 export interface PaginationInfo {
   page: number;
   limit: number;