Align open auction volume semantics

crates/fidc-core/src/broker.rs

@@ -1444,7 +1444,7 @@ where
         }
 
         let mut max_fill = requested_qty;
-        if self.liquidity_limit {
+        if self.liquidity_limit && !self.is_open_auction_matching() {
             let top_level_liquidity = match side {
                 OrderSide::Buy => snapshot.liquidity_for_buy(),
                 OrderSide::Sell => snapshot.liquidity_for_sell(),