fix anomaly service

shared/schema/anomalies/AnomalyVisitSchema.ts

@@ -3,13 +3,13 @@ import { model, Schema, Types } from 'mongoose';
 
 export type TAnomalyVisit = {
     project_id: Schema.Types.ObjectId
-    visitDate: string,
+    visitDate: Date,
     created_at: Date
 }
 
 const AnomalyVisitSchema = new Schema<TAnomalyVisit>({
     project_id: { type: Types.ObjectId, required: true },
-    visitDate: { type: String, required: true },
+    visitDate: { type: Date, required: true },
     created_at: { type: Date, required: true },
 })