feat(2meet-data-optimizer): warn when HivePress / WooCommerce run without their AddOn

- TMDO_Compatibility::missing_integration_addons() reports active HivePress / WooCommerce whose AddOn bootstrap class is absent
- Surface it as Site Health test wpdo_missing_integration_addons (also on the admin Doctor tab) and an administrator notice (TMDO_Missing_Addons_Notice)
- Verify: MissingIntegrationAddonsTest (5, class stand-ins in separate processes); core unit 651 / integration 449, HP 148, WC 10 OK; read-only check: dev20/21 HivePress+WooCommerce, dev22 HivePress, others clean
- PR: PR-035

admin/class-tmdo-help-tabs.php

@@ -183,7 +183,7 @@ class TMDO_Help_Tabs {
 	 * @return string
 	 */
 	private static function content_doctor(): string {
-		return '<p>' . esc_html__( '9 項自動健康檢查：', '2meet-data-optimizer' ) . '</p>'
+		return '<p>' . esc_html__( '10 項自動健康檢查：', '2meet-data-optimizer' ) . '</p>'
 			. '<ol class="wpdo-list-disc">'
 			. '<li><strong>schema_drift</strong> — ' . esc_html__( '所有 v2 表是否存在', '2meet-data-optimizer' ) . '</li>'
 			. '<li><strong>error_budget</strong> — ' . esc_html__( '7 天內 wp_wpdo_errors 行數', '2meet-data-optimizer' ) . '</li>'
@@ -194,6 +194,7 @@ class TMDO_Help_Tabs {
 			. '<li><strong>missing_snapshot</strong> — ' . esc_html__( '在 cutover/cleanup/complete 但 7 天沒 snapshot', '2meet-data-optimizer' ) . '</li>'
 			. '<li><strong>entity_group_collisions</strong> — ' . esc_html__( '同名實體群組被不同外掛以不同欄位註冊（後者被忽略）', '2meet-data-optimizer' ) . '</li>'
 			. '<li><strong>orphaned_entity_groups</strong> — ' . esc_html__( '扁平表還在但已無外掛註冊的群組（已依保存的定義還原以維持可讀）', '2meet-data-optimizer' ) . '</li>'
+			. '<li><strong>missing_integration_addons</strong> — ' . esc_html__( 'HivePress / WooCommerce 已啟用但對應 AddOn 未啟用', '2meet-data-optimizer' ) . '</li>'
 			. '</ol>'
 			. '<p>' . esc_html__( '結果有 5 分鐘 transient cache，剛操作完想立刻看新值請等下個週期。', '2meet-data-optimizer' ) . '</p>';
 	}