Introduced a function `get_event_guest_gift_reservations` in the CRUD layer to fetch gift reservations filtered by event ID. Updated the API endpoint to optionally accept an `event_id` query parameter for retrieving reservations specific to an event.
Introduced a new route to fetch all guest gift reservations, ensuring API compatibility with GiftPurchase objects. Refactored CRUD functions to optimize data fetching and avoid N+1 queries. Added validation to restrict access to non-public event-related reservations.
Allow cancellation of gifts with a status of either RESERVED or RECEIVED. This ensures consistency in handling gift statuses during reservation management across the application.
