fix(postgres): aggregate bare account in pos_closing payments; explicit limit on gl-entry fetch

Address review (#56111):
- pos_closing get_payments grouped by mode_of_payment but selected a bare account ->
  Postgres GroupingError. Wrap in Max() (deterministic, both engines agree; account is
  consumed downstream for the change-amount adjustment). test_pos_closing_entry 9/9 both engines.
- get_voucherwise_gl_entries: add limit=0 to make the unbounded fetch explicit.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

erpnext/accounts/doctype/pos_closing_entry/pos_closing_entry.py

@@ -295,7 +295,7 @@ def get_payments(invoices):
 		.groupby(SalesInvoicePayment.mode_of_payment)
 		.select(
 			SalesInvoicePayment.mode_of_payment,
-			SalesInvoicePayment.account.as_("account"),
+			fn.Max(SalesInvoicePayment.account).as_("account"),
 			fn.Sum(SalesInvoicePayment.amount).as_("amount"),
 		)
 	)

erpnext/accounts/utils.py

@@ -1835,6 +1835,7 @@ def get_voucherwise_gl_entries(future_stock_vouchers, posting_date):
 		"GL Entry",
 		filters={"posting_date": [">=", posting_date], "voucher_no": ["in", voucher_nos]},
 		fields=["name", "account", "credit", "debit", "cost_center", "project", "voucher_type", "voucher_no"],
+		limit=0,
 	)
 
 	for d in gles: