<UserStory> 1954: Implement Service Refactoring </UserStory>
UserStory #1954
<Changes>
1. Refactored notification handling to persist notifications directly in the datastore instead of maintaining notification collections within User objects.
2. Removed recipient User pointer dependencies from Notification and retained recipient user identification through recipientUserId.
3. Implemented generic observer persistence support in DataStore with shared helper methods for loading and saving observer subscriptions.
4. Added datastore-backed observer management for ServiceManagementService, PaymentManagementService, and InventoryManagementService.
5. Updated attach() and detach() operations to load, modify, and persist observer subscriptions using shared memory mappings.
6. Refactored sendNotification() implementations to create and persist Notification records directly to the datastore for subscribed observers.
7. Updated UserManagementService notification retrieval and deletion logic to operate on datastore notification records filtered by recipient user ID.
8. Removed notification ownership and observer-specific notification APIs from User and Observer classes.
9. Added configurable shared memory growth factor support and updated mapping expansion logic to use centralized configuration values.
10. Removed obsolete NotificationManagementService implementation and updated project configuration references.
11. Added DataStoreLockGuard integration for observer and notification persistence operations to ensure synchronized datastore access.
</Changes>
<Test>
N/A
</Test>
<Review>
Sreeja Reghukumar, please review
</Review>
<UserStory> 1960: Service Refactoring </UserStory>
UserStory #1960
<Changes>
1. Replaced the Controller load/save workflow with initialize() and shutdown() methods.
2. Moved startup checks such as admin verification, low stock alerts, and payment reminders into Controller::initialize().
3. Updated UserInterface to use the new Controller initialization and shutdown flow.
4. Updated DataStore::getUsers() and DataStore::getNotifications() to load data directly from shared memory.
5. Added logic to rebuild user notification mappings when user data is loaded from shared memory.
6. Implemented user and notification persistence through DataStore::saveUsers() and DataStore::saveNotifications().
7. Updated UserManagementService to use TrackedRecord-based shared memory records.
8. Added DataStore locking and unlocking to user management operations for synchronization.
9. Updated createUser(), updateUserDetails(), removeUser(), and deleteNotification() to persist changes through shared memory.
10. Removed legacy loadUsers() and saveUsers() implementations from UserManagementService.
11. Added required header dependencies for shared memory support.
</Changes>
<Test>
N/A
</Test>
<Review>
Sreeja Reghukumar, please review
</Review>
joelthomastrenser
Jissin Mathew