adding models and stale state for convos

packages/core/models/conversation.model.ts

@@ -0,0 +1,30 @@
+import { ObjectId } from "mongodb";
+
+export class Conversation {
+  _id: ObjectId;
+  name?: string;
+
+  createdDate: Date;
+  lastUpdatedDate: Date;
+
+  constructor() {}
+}
+
+export class ConversationMember {
+  _id: ObjectId;
+
+  // unique constraint
+  conversationId: ObjectId;
+  userId: ObjectId;
+
+  state: ConversationMemberState;
+
+  createdDate: Date;
+}
+
+export enum ConversationMemberState {
+  INVITED = "INVITED", // user gets this in their request inbox
+  INBOX = "INBOX", // user decided to join this conversation after being invited
+  TUNED = "TUNED", // user upgraded priority of this and now is tuned in live to convo
+  ARCHIVED = "ARCHIVED", // user no longer wants anything to do with convo
+}