Add metadata to backtest

src/Managing.Infrastructure.Database/MongoDb/MongoMappers.cs

@@ -150,7 +150,8 @@ public static class MongoMappers
             StartDate = b.StartDate,
             EndDate = b.EndDate,
             Score = b.Score,
-            RequestId = b.RequestId
+            RequestId = b.RequestId,
+            Metadata = string.IsNullOrEmpty(b.Metadata) ? null : JsonSerializer.Deserialize<object>(b.Metadata)
         };
 
         return bTest;
@@ -178,7 +179,8 @@ public static class MongoMappers
             StartDate = result.StartDate,
             EndDate = result.EndDate,
             Score = result.Score,
-            RequestId = result.RequestId
+            RequestId = result.RequestId,
+            Metadata = result.Metadata == null ? null : JsonSerializer.Serialize(result.Metadata)
         };
     }