fix(db): 把校正标题/活跃时间修补搬成迁移

BUG-699 / BUG-704 的数据修补原先只存在于
frontend/scripts/repair-rectification-session-titles.mjs，需要
SCHEMA_DATABASE_URL 才能跑，产品负责人没有任何按钮能执行它，所以那批
错日期的会话标题一直没修。

脚本里本来就是纯 SQL，搬进一次性迁移即可复用现成的
`Migrate Staging Database` 按钮：

- 新增 20260916020000_rectification_session_title_repair.sql，两段 update
  逐字取自脚本（合同测试比对，改了哪边都会红）；权限守卫沿用
  20260915010000 的 schema_owner 写法。
- 幂等：改完之后两段 where 都不再匹配同一行，重复应用影响 0 行。
- 各自 get diagnostics + raise notice 打出行数；db-migrate.mjs 加 notice
  转发，否则 node-postgres 会把 NOTICE 丢掉，迁移日志里一个数字都看不到。
- 脚本降级为只读核对工具：--apply 改为报错并指向迁移；导入不再连库。

生产停在 7b620c7a（没有 use-rectification-surface.ts，标题固定且不写库），
两段 where 自然匹配 0 行，是预期内的 no-op。

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01JUei7K13cYxLHE3Axe4A45

frontend/scripts/db-migrate.mjs

@@ -139,6 +139,13 @@ export async function runMigrations({
 }) {
   const files = await loadMigrationFiles(migrationsDirectories ?? migrationsDirectory);
   const client = new Client({ connectionString });
+  // Data-repair migrations report how many rows they touched with RAISE NOTICE.
+  // node-postgres drops notices when nothing listens, which would leave the
+  // staging migration log with no row counts at all (BUG-699 / BUG-704 repair).
+  client.on("notice", (notice) => {
+    const message = typeof notice?.message === "string" ? notice.message.trim() : "";
+    if (message) logger.log(`notice ${message}`);
+  });
   let locked = false;
 
   try {

frontend/scripts/repair-rectification-session-titles.mjs

@@ -1,8 +1,23 @@
+// 只读核对工具。**修补本身已由迁移承担**：
+// frontend/supabase/migrations/20260916020000_rectification_session_title_repair.sql
+// 产品跑 Gitea → `Migrate Staging Database` 就会应用它，不需要 SSH 或库口令。
+//
+// 本文件保留下来有两个用处：
+//   1. 排查时数一数还有多少行没对上（不写库，只 select count）；
+//   2. 下面三段 SQL 是那条迁移的**唯一出处**，迁移逐字抄它们。
+//      tests/rectification-session-title-repair-migration.test.ts 会比对两边，
+//      改了这里而没同步迁移（或反过来）测试就红。
+//
+// 需要 SCHEMA_DATABASE_URL 才能连库；没有它的环境只能跑上面那个合同测试。
+
+import { resolve } from "node:path";
+import { pathToFileURL } from "node:url";
+
 import pg from "pg";
 
 const { Client } = pg;
 
-const TITLE_MATCH_SQL = `
+export const TITLE_MATCH_SQL = `
 session_type = 'birth_time_rectification'
 and title ~ '^[0-9]{1,2}月[0-9]{1,2}日[[:space:]]*·[[:space:]]*生时校正([[:space:]]+[0-9]{2}:[0-9]{2})?$'
 and (
@@ -16,7 +31,7 @@ and (
 
 const TITLE_COUNT_SQL = `select count(*)::int as n from public.chat_sessions where ${TITLE_MATCH_SQL}`;
 
-const TITLE_APPLY_SQL = `
+export const TITLE_APPLY_SQL = `
 update public.chat_sessions
 set title = case
   when created_at is null then '生时校正'
@@ -43,7 +58,7 @@ where session.session_type = 'birth_time_rectification'
   and session.updated_at < coalesce(turns.last_turn_at, case_row.last_activity_at)
 `;
 
-const ACTIVITY_APPLY_SQL = `
+export const ACTIVITY_APPLY_SQL = `
 update public.chat_sessions as session
 set updated_at = coalesce(turns.last_turn_at, case_row.last_activity_at)
 from public.agentic_rectification_cases as case_row
@@ -70,29 +85,34 @@ function connectionString() {
 }
 
 async function main() {
-  const apply = process.argv.includes("--apply");
+  if (process.argv.includes("--apply")) {
+    throw new Error(
+      "--apply has been removed; the repair now ships as migration " +
+        "20260916020000_rectification_session_title_repair.sql. " +
+        "Apply it with Gitea -> Migrate Staging Database.",
+    );
+  }
   const client = new Client({ connectionString: connectionString() });
   await client.connect();
   try {
-    const titlesBefore = await client.query(TITLE_COUNT_SQL);
-    const activityBefore = await client.query(ACTIVITY_COUNT_SQL);
-    console.log(`mismatched_dated_rectification_titles=${titlesBefore.rows[0]?.n ?? 0}`);
-    console.log(`stale_rectification_updated_at=${activityBefore.rows[0]?.n ?? 0}`);
-    if (!apply) return;
-    const titlesUpdated = await client.query(TITLE_APPLY_SQL);
-    const activityUpdated = await client.query(ACTIVITY_APPLY_SQL);
-    const titlesAfter = await client.query(TITLE_COUNT_SQL);
-    const activityAfter = await client.query(ACTIVITY_COUNT_SQL);
-    console.log(`updated_title_rows=${titlesUpdated.rowCount ?? 0}`);
-    console.log(`updated_activity_rows=${activityUpdated.rowCount ?? 0}`);
-    console.log(`mismatched_after=${titlesAfter.rows[0]?.n ?? 0}`);
-    console.log(`stale_updated_at_after=${activityAfter.rows[0]?.n ?? 0}`);
+    const titles = await client.query(TITLE_COUNT_SQL);
+    const activity = await client.query(ACTIVITY_COUNT_SQL);
+    console.log(`mismatched_dated_rectification_titles=${titles.rows[0]?.n ?? 0}`);
+    console.log(`stale_rectification_updated_at=${activity.rows[0]?.n ?? 0}`);
   } finally {
     await client.end();
   }
 }
 
-main().catch((error) => {
-  console.error(error instanceof Error ? error.message : error);
-  process.exit(1);
-});
+// Only connect when run as a command. Importing this file (the contract test
+// does) must not open a database connection.
+const invokedPath = process.argv[1]
+  ? pathToFileURL(resolve(process.argv[1])).href
+  : undefined;
+
+if (invokedPath === import.meta.url) {
+  main().catch((error) => {
+    console.error(error instanceof Error ? error.message : error);
+    process.exitCode = 1;
+  });
+}