refactor: remove redundant isRecurring property, use recurrenceRule instead

isRecurring was redundant since recurrenceRule as truthy/falsy check suffices.
Removed from shared CalendarEvent type, Mongoose virtual, and all usages.

apps/server/src/repositories/mongo/models/EventModel.ts

@@ -2,22 +2,18 @@ import mongoose, { Schema, Document, Model } from "mongoose";
 import { CalendarEvent } from "@calchat/shared";
 import { IdVirtual } from "./types";
 
-interface EventVirtuals extends IdVirtual {
-  isRecurring: boolean;
-}
-
 export interface EventDocument
-  extends Omit<CalendarEvent, "id" | "isRecurring">,
+  extends Omit<CalendarEvent, "id">,
     Document {
   toJSON(): CalendarEvent;
 }
 
 const EventSchema = new Schema<
   EventDocument,
-  Model<EventDocument, {}, {}, EventVirtuals>,
+  Model<EventDocument, {}, {}, IdVirtual>,
   {},
   {},
-  EventVirtuals
+  IdVirtual
 >(
   {
     userId: {
@@ -61,11 +57,6 @@ const EventSchema = new Schema<
           return this._id.toString();
         },
       },
-      isRecurring: {
-        get() {
-          return !!this.recurrenceRule;
-        },
-      },
     },
     toJSON: {
       virtuals: true,