test: align database initialization contracts

iam/src/test/java/com/baiyue/iam/repository/CustomerProfileMigrationContractTest.java

@@ -73,7 +73,9 @@ class CustomerProfileMigrationContractTest {
                 .contains("SELECT 'PASS' AS initialization_status")
                 .doesNotContain("ALTER TABLE iam_tenant", "phase1_iam_add_column");
         assertThat(instructions)
-                .contains("当前开发阶段只维护纯初始化")
+                .contains("两个统一 SQL 文件仍只用于空库初始化")
+                .contains("已有生产库的受控结构补齐单独放在 `migrations/`")
+                .contains("不提供存量数据回填、清理或兼容入口")
                 .contains("模块 `src/main/resources/db/` 用作结构来源和开发追溯")
                 .contains("不再向历史迁移文件追加发布步骤");
     }

iam/src/test/java/com/baiyue/iam/repository/Phase5DeliveryPermissionSqlContractTest.java

@@ -160,8 +160,9 @@ class Phase5DeliveryPermissionSqlContractTest {
         String readme = repositoryFile("deploy/sql/README.md");
 
         assertThat(readme).contains(
-            "当前开发阶段只维护纯初始化",
-            "两个 SQL 文件沿用原文件名",
+            "两个统一 SQL 文件仍只用于空库初始化",
+            "已有生产库的受控结构补齐单独放在 `migrations/`",
+            "不提供存量数据回填、清理或兼容入口",
             "国内 IAM 是全部平台与客户权限的唯一权威",
             "模块 `src/main/resources/db/` 用作结构来源和开发追溯",
             "不再向历史迁移文件追加发布步骤");