feat(push-notification): persist in-app notifications before sending …#99

fulleni merged 2 commits intomainflutter-news-app-full-source-code/flutter-news-app-api-server-full-source-code:mainfrom

feat/In-App-Notification-Persistenceflutter-news-app-full-source-code/flutter-news-app-api-server-full-source-code:feat/In-App-Notification-PersistenceCopy head branch name to clipboard