feat: persistent memories (#8330)

* feat: persistent memories

* refactor: use new add/remove asset utility

server/test/repositories/memory.repository.mock.ts

@@ -0,0 +1,14 @@
+import { IMemoryRepository } from 'src/interfaces/memory.interface';
+
+export const newMemoryRepositoryMock = (): jest.Mocked<IMemoryRepository> => {
+  return {
+    search: jest.fn().mockResolvedValue([]),
+    get: jest.fn(),
+    create: jest.fn(),
+    update: jest.fn(),
+    delete: jest.fn(),
+    getAssetIds: jest.fn().mockResolvedValue(new Set()),
+    addAssetIds: jest.fn(),
+    removeAssetIds: jest.fn(),
+  };
+};