feat(v2): gateway 经 Picker 路由选账户 + retry 换号(ExcludeAccounts);替换首个 enabled

internal/store/attempt_accounts.go

@@ -0,0 +1,19 @@
+package store
+
+import (
+	"fmt"
+
+	"github.com/wangjia/pay/internal/model"
+)
+
+// AttemptAccountIDs returns the distinct account_ids already tried for an order on a
+// channel (used by retry to switch to a not-yet-tried account via PickHint.ExcludeAccounts).
+func (s *OrderStore) AttemptAccountIDs(outTradeNo, channel string) ([]string, error) {
+	var ids []string
+	if err := s.db.Model(&model.Attempt{}).
+		Where("out_trade_no = ? AND channel = ? AND account_id <> ''", outTradeNo, channel).
+		Distinct().Pluck("account_id", &ids).Error; err != nil {
+		return nil, fmt.Errorf("store.AttemptAccountIDs: %w", err)
+	}
+	return ids, nil
+}