fix(activity): 移除对对碰候选奖励的库存前置过滤

对对碰结算时不再因 activity_reward_settings.quantity 小于等于 0 而提前跳过候选奖励，便于按实际商品库存进行排查与处理。

internal/api/activity/matching_game_app.go

@@ -439,9 +439,6 @@ func (h *handler) CheckMatchingGame() core.HandlerFunc {
 		if err == nil && len(rewards) > 0 {
 			var candidate *model.ActivityRewardSettings
 			for _, r := range rewards {
-				if r.Quantity <= 0 {
-					continue
-				}
 				if actualPairs == r.MinScore {
 					candidate = r
 					break