Improve handling of stored procedure return value type

Check if return value is already a long before parsing its
string representation. This enhances robustness and efficiency
when the value is of the correct type.

src/ReC.Application/Common/Procedures/InsertObjectProcedure.cs

@@ -156,7 +156,9 @@ public class InsertObjectProcedureHandler(IRepository repo) : IRequestHandler<In
         var guidParam = parameters.Last();
 
         if (guidParam.Value != DBNull.Value)
-            if (long.TryParse(guidParam.Value.ToString(), out var guid))
+            if (guidParam.Value is long longValue)
+                return longValue;
+            else if (long.TryParse(guidParam.Value.ToString(), out var guid))
                 return guid;
 
         return 0;