refactor: replace client deletion with user detachment and update client schema to support optional user association

server/src/Models/Clients/Clients.Adapter.Mongoose.ts

@@ -6,6 +6,7 @@ import {
     CreateClientByUserParams,
     PaginateClientsParams,
     PaginateClientsResults,
+    DetachClientUserParams,
 } from "./Clients.Interface";
 import { Document, FilterQuery, Model, Schema, model } from "mongoose";
 
@@ -96,4 +97,8 @@ export class ClientsAdapterMongoose implements IClientsAdapter {
             pages: Math.ceil(count / filters.limit),
         };
     }
+
+    public async detachUser(data: DetachClientUserParams): Promise<void> {
+        await this.clientList.updateOne({ _id: data.clientId }, { $unset: { userId: "" } }).exec();
+    }
 }