feat(po-returns): make warehouse_id optional and refactor validation logic

base_qty renames to ord_uom_qty and base_uom into ord_uom in all services and modules

feat(orders): Refactor PO item handling to introduce base quantities and units, enhancing transaction accuracy

warehouse_id changes

Merge branch 'main' of https://huggingface.co/spaces/cuatrolabs/cuatrolabs-scm-ms

feat: Implement bulk stock movement and item detail retrieval functions

added all sql stored function