Refacor electron app and add migrations

electron/cqrs/queries/handlers/getUsersByRoom.ts

@@ -0,0 +1,11 @@
+import { DataSource } from 'typeorm';
+import { UserEntity } from '../../../entities';
+import { rowToUser } from '../../mappers';
+
+/** Returns all stored users (room filtering not applicable in this schema). */
+export async function handleGetUsersByRoom(dataSource: DataSource) {
+  const repo = dataSource.getRepository(UserEntity);
+  const rows = await repo.find();
+
+  return rows.map(rowToUser);
+}