Revert "refactor: 清理租户API旧模块代码"

This reverts commit 992930a821.

src/Infrastructure/TakeoutSaaS.Infrastructure/Common/Persistence/DatabaseConnectionDetails.cs

@@ -0,0 +1,10 @@
+namespace TakeoutSaaS.Infrastructure.Common.Persistence;
+
+/// <summary>
+/// 数据库连接信息（连接串与超时/重试设置）。
+/// </summary>
+public sealed record DatabaseConnectionDetails(
+    string ConnectionString,
+    int CommandTimeoutSeconds,
+    int MaxRetryCount,
+    int MaxRetryDelaySeconds);