* fix: Assign Item's default weight_per_unit as its weight_per_unit in get_item_details
* fix: Set weight_uom in get_item_details as Item's default weight_uom
(cherry picked from commit 471f48f64db0f8da9d4703f4b82b6f9517fbacae)
Co-authored-by: Ganga Manoj <ganga.manoj98@gmail.com>