Update GetUnProcessedNotices to filter by main_classification and change sort order

- Modified the GetUnProcessedNotices method in the notice repository to include a filter for main_classification set to "72000000".
- Changed the sort order from ascending to descending for the created_at field, improving the retrieval of unprocessed notices.

internal/notice/repository.go

@@ -142,13 +142,13 @@ func (r *noticeRepository) GetByContractNoticeID(ctx context.Context, contractNo
 // GetUnProcessedNotices retrieves unprocessed notices
 
 func (r *noticeRepository) GetUnProcessedNotices(ctx context.Context, limit int, skip int) ([]Notice, int64, error) {
-	filter := bson.M{"processing_metadata.processed": false}
+	filter := bson.M{"processing_metadata.processed": false, "main_classification": "72000000"}
 
 	pagination := orm.Pagination{
 		Limit:     limit,
 		Skip:      skip,
 		SortField: "created_at",
-		SortOrder: 1,
+		SortOrder: -1,
 	}
 
 	result, err := r.ormRepo.FindAll(ctx, filter, pagination)