<UserStory> 1927: Implement Service Refactorings </UserStory>
UserStory #1927
<Changes>
1. Added DataStoreLockGuard integration across ServiceManagementService methods for thread-safe datastore operations.
2. Updated DataStore::getServices(), getComboPackages(), getServiceBookings(), and getJobCards() to enrich records with linked entities (inventory items, services, bookings, technicians).
3. Modified ServiceManagementService::purchaseService() and purchaseComboPackage() to use tracked records and persist bookings safely.
4. Enhanced restoreInventory() and processBookingCancellation() to handle tracked records, update record states, and restore inventory items correctly.
5. Refactored cancelCustomerServiceBookings() and cancelTechnicianJobs() to use tracked records, restore inventory, and persist changes.
6. Updated createComboPackage(), removeComboPackage(), and createJobCard() to use tracked records and save changes to datastore.
7. Updated createService() to validate inventory items with tracked records and persist new services safely.
8. Added required header dependencies for DataStoreLockGuard and shared memory support.
</Changes>
<Test>
N/A
</Test>
<Review>
Sreeja Reghukumar, please review
</Review>
Jissin Mathew
joelthomastrenser