Add SS_ prefix to DatabaseExporter test table names

- Add TableNamePrefix property to DatabaseExporter
- Set SS_ prefix in ExportTests for consistent table naming

Author: mikasoukhov

Algo.Export/DatabaseExporter.cs

@@ -66,6 +66,11 @@ public int BatchSize
 	/// </summary>
 	public bool DropExisting { get; set; }
 
+	/// <summary>
+	/// Optional prefix for table names (e.g. "SS_").
+	/// </summary>
+	public string TableNamePrefix { get; set; }
+
 	/// <inheritdoc />
 	protected override Task<(int, DateTime?)> ExportOrderLogAsync(IAsyncEnumerable<ExecutionMessage> messages, CancellationToken cancellationToken)
 		=> DoAsync(messages, nameof(ExecutionMessage).Remove(nameof(Message)), GetExecutionColumns, ToExecutionDict, cancellationToken);
@@ -128,7 +133,7 @@ public int BatchSize
 		var lastTime = default(DateTime?);
 
 		using var db = _dbProvider.CreateConnection(_connection);
-		var table = _dbProvider.GetTable(db, tableName);
+		var table = _dbProvider.GetTable(db, TableNamePrefix + tableName);
 
 		if (DropExisting)
 			await table.DropAsync(cancellationToken);

Tests/ExportTests.cs

@@ -53,6 +53,7 @@ async Task Do(string extension, Func<Stream, BaseExporter> create)
 		})
 		{
 			DropExisting = true,
+			TableNamePrefix = "SS_",
 		};
 		var (dbCount, dbLastTime) = await dbExporter.Export(arr.ToAsyncEnumerable(), token);
 		validateResult(dbCount, dbLastTime, "DB");