chore(2meet-data-optimizer): address the 2.1 audit notes

- The four public REST routes say why they are public (viewable posts only, show_in_rest fields only, per_page cap, one view per IP per post per hour).
- Admin ternary echoes of literal strings are escaped for their context: esc_attr() in attributes, esc_html() for text; the object-cache badge is an if/else and aria-current is always printed ("false" off the current tab).
- Exceptions in the migration engine and the health cron go to TMDO_Logger instead of error_log().
- Verify: audit greps (ternary echoes 23 → 0, error_log outside the logger 0); dev36 renders 8 admin tabs with the change, no PHP notice, one aria-current="page" each.
- PR: PR-078

admin/templates/term-stress-test.php

@@ -207,7 +207,7 @@ $total_termmeta   = (int) $wpdb->get_var( "SELECT COUNT(*) FROM {$wpdb->termmeta
 	</div>
 
 	<!-- Progress card (live) -->
-	<div id="wpdo-tst-progress-card" class="wpdo-card wpdo-mt-3<?php echo $is_running ? '' : ' wpdo-hidden'; ?>">
+	<div id="wpdo-tst-progress-card" class="wpdo-card wpdo-mt-3<?php echo esc_attr( $is_running ? '' : ' wpdo-hidden' ); ?>">
 		<h3 class="wpdo-mt-0"><?php esc_html_e( '2. 即時進度', '2meet-data-optimizer' ); ?></h3>
 		<div class="wpdo-bar-section">
 			<div class="wpdo-bar-header">
@@ -245,7 +245,7 @@ $total_termmeta   = (int) $wpdb->get_var( "SELECT COUNT(*) FROM {$wpdb->termmeta
 	</div>
 
 	<!-- Benchmark report -->
-	<div id="wpdo-tst-bench-card" class="wpdo-card wpdo-mt-3<?php echo ! empty( $state['benchmark'] ) ? '' : ' wpdo-hidden'; ?>">
+	<div id="wpdo-tst-bench-card" class="wpdo-card wpdo-mt-3<?php echo esc_attr( ! empty( $state['benchmark'] ) ? '' : ' wpdo-hidden' ); ?>">
 		<h3 class="wpdo-mt-0"><?php esc_html_e( '3. Benchmark 報告', '2meet-data-optimizer' ); ?></h3>
 		<div id="wpdo-tst-bench-content"></div>
 	</div>