refactor(purchase-order): use ORM syntax for min order quantity query (#54778)

* refactor(purchase-order): use ORM syntax for min order quantity query

Use frappe.get_all instead of raw SQL with manual string formatting
to fetch min_order_qty. This improves code readability and leverages
the framework's built-in database abstraction.

* chore: fix formatting

* chore: fix formatting

* chore: fix formatting by adding a space

erpnext/buying/doctype/purchase_order/purchase_order.py

@@ -293,15 +293,14 @@ class PurchaseOrder(BuyingController):
 		self.party_account_currency = get_party_account_currency("Supplier", self.supplier, self.company)
 
 	def validate_minimum_order_qty(self):
+		"""Check if total ordered quantities meet the Item's minimum order requirement."""
 		if not self.get("items"):
 			return
 		items = list(set(d.item_code for d in self.get("items")))
 
 		itemwise_min_order_qty = frappe._dict(
-			frappe.db.sql(
-				"""select name, min_order_qty
-			from tabItem where name in ({})""".format(", ".join(["%s"] * len(items))),
-				items,
+			frappe.get_all(
+				"Item", fields=["name", "min_order_qty"], filters={"name": ["in", items]}, as_list=True
 			)
 		)