chore: 主檔補 TablePrefix header（F5）

打包腳本 §10 schema drift 終檢以主檔 header 為主路徑，
package-plugin.sh 的 case fallback 僅為防禦性後備。

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01TbG1keQQ7XBa7qMQY16KCY

2meet-data-optimizer-latepoint-addon.php

@@ -13,6 +13,8 @@
  * License:           GPL-2.0-or-later
  * License URI:       https://www.gnu.org/licenses/gpl-2.0.html
  * Text Domain:       tmdo-latepoint
+ *
+ * TablePrefix: ^hpct_latepoint_[a-z_0-9]+$
  * Domain Path:       /languages
  *
  * @package TMDO_LATEPOINT