Revert "Push reuse logic to GetOrderBookSnapshotAsync()"

This reverts commit 3d33f06.

Author: codez0mb1e

src/BinanceBot.Market/MarketDepthManager.cs

@@ -163,7 +163,25 @@ public async Task BuildAsync(MarketDepth marketDepth, short orderBookDepth = 10,
         {
             _logger.Warn($"Snapshot too old: LastUpdateId={snapshot.LastUpdateId} < FirstEvent.U={firstEvent.FirstUpdateId}. Retrying...");
             // Snapshot is too old, need to get a new one
-            response = await GetOrderBookSnapshotAsync(marketDepth.Symbol, orderBookDepth, ct).ConfigureAwait(false);
+            switch (marketDepth.Symbol.ContractType)
+            {
+                case ContractType.Spot:
+                    WebCallResult<BinanceOrderBook> spotResponse = await _restClient.SpotApi.ExchangeData.GetOrderBookAsync(
+                        marketDepth.Symbol.FullName, orderBookDepth, ct)
+                    .ConfigureAwait(false);
+    
+                    response = (spotResponse.Success, spotResponse.Data, spotResponse.Error);
+                    break;
+                case ContractType.Futures:
+                    WebCallResult<BinanceFuturesOrderBook> futuresResponse = await _restClient.UsdFuturesApi.ExchangeData.GetOrderBookAsync(
+                        marketDepth.Symbol.FullName, orderBookDepth, ct)
+                    .ConfigureAwait(false);
+    
+                    response = (futuresResponse.Success, futuresResponse.Data, futuresResponse.Error);
+                    break;
+                default:
+                    throw new ArgumentOutOfRangeException(nameof(marketDepth.Symbol.ContractType), "Unknown contract type.");
+            }
 
             if (!response.Success || response.Data == null)
                 throw new InvalidOperationException($"Failed to get order book snapshot: {response.Error?.Message}");