fix: allow to set rate manually for service item in BOM (#38880)

erpnext/patches/v14_0/set_maintain_stock_for_bom_item.py

@@ -0,0 +1,19 @@
+import frappe
+
+
+def execute():
+	if not frappe.db.exists("BOM", {"docstatus": 1}):
+		return
+
+	# Added is_stock_item to handle Read Only based on condition for the rate field
+	frappe.db.sql(
+		"""
+		UPDATE
+			`tabBOM Item` boi,
+			`tabItem` i
+		SET
+			boi.is_stock_item = i.is_stock_item
+		WHERE
+			boi.item_code = i.name
+	"""
+	)