feat: persistent memories (#8330)

* feat: persistent memories

* refactor: use new add/remove asset utility

mobile/openapi/test/memory_response_dto_test.dart

@@ -0,0 +1,77 @@
+//
+// AUTO-GENERATED FILE, DO NOT MODIFY!
+//
+// @dart=2.12
+
+// ignore_for_file: unused_element, unused_import
+// ignore_for_file: always_put_required_named_parameters_first
+// ignore_for_file: constant_identifier_names
+// ignore_for_file: lines_longer_than_80_chars
+
+import 'package:openapi/api.dart';
+import 'package:test/test.dart';
+
+// tests for MemoryResponseDto
+void main() {
+  // final instance = MemoryResponseDto();
+
+  group('test MemoryResponseDto', () {
+    // List<AssetResponseDto> assets (default value: const [])
+    test('to test the property `assets`', () async {
+      // TODO
+    });
+
+    // DateTime createdAt
+    test('to test the property `createdAt`', () async {
+      // TODO
+    });
+
+    // Object data
+    test('to test the property `data`', () async {
+      // TODO
+    });
+
+    // DateTime deletedAt
+    test('to test the property `deletedAt`', () async {
+      // TODO
+    });
+
+    // String id
+    test('to test the property `id`', () async {
+      // TODO
+    });
+
+    // bool isSaved
+    test('to test the property `isSaved`', () async {
+      // TODO
+    });
+
+    // DateTime memoryAt
+    test('to test the property `memoryAt`', () async {
+      // TODO
+    });
+
+    // String ownerId
+    test('to test the property `ownerId`', () async {
+      // TODO
+    });
+
+    // DateTime seenAt
+    test('to test the property `seenAt`', () async {
+      // TODO
+    });
+
+    // String type
+    test('to test the property `type`', () async {
+      // TODO
+    });
+
+    // DateTime updatedAt
+    test('to test the property `updatedAt`', () async {
+      // TODO
+    });
+
+
+  });
+
+}