Add Notification Filters for Seen and Priority

- Introduced new optional fields in the SearchForm for filtering notifications by 'seen' status and 'priority', enhancing the flexibility of notification retrieval.
- Updated the GetNotifications method in the notification service to accommodate the new filters, ensuring they are included in the query parameters.
- Enhanced the notification client to support the new filters in API requests, improving the overall functionality of the notification system.
- Updated API documentation with Swagger comments to reflect the new query parameters, ensuring clarity for API consumers.

internal/notification/service.go

@@ -165,6 +165,8 @@ func (s *notificationService) GetNotifications(ctx context.Context, req *SearchF
 		"event_type": req.EventType,
 		"type":       req.Type,
 		"recipient":  req.Recipient,
+		"seen":       req.Seen,
+		"priority":   req.Priority,
 		"limit":      pagination.Limit,
 		"offset":     pagination.Offset,
 	})
@@ -175,6 +177,8 @@ func (s *notificationService) GetNotifications(ctx context.Context, req *SearchF
 		EventType: req.EventType,
 		Type:      req.Type,
 		UserID:    req.Recipient,
+		Seen:      req.Seen,
+		Priority:  req.Priority,
 		PerPage:   pagination.Limit,
 		Page:      pagination.Offset / pagination.Limit,
 	})