fix: handle stock balance unbuffered_cursor error (backport #41186) (#41187)

fix: handle stock balance unbuffered_cursor error (#41186)

(cherry picked from commit 341fb6d8f3)

Co-authored-by: Ankush Menat <ankush@frappe.io>

erpnext/stock/report/stock_balance/stock_balance.py

@@ -141,6 +141,8 @@ class StockBalanceReport:
 		if self.filters.get("show_stock_ageing_data"):
 			self.sle_entries = self.sle_query.run(as_dict=True)
 
+		# HACK: This is required to avoid causing db query in flt
+		_system_settings = frappe.get_cached_doc("System Settings")
 		with frappe.db.unbuffered_cursor():
 			if not self.filters.get("show_stock_ageing_data"):
 				self.sle_entries = self.sle_query.run(as_dict=True, as_iterator=True)