fix(boundary): 核心不得無守衛呼叫 AddOn 的 TMDO_Listing_Stats

實機渲染時 Dashboard 分頁 fatal："Class TMDO_Listing_Stats not found"。
該類別住在 hivepress-addon，核心有 6 處直呼，沒裝 AddOn 的站台會炸掉
Dashboard 與兩個 REST 端點（GET /listing/{id}、POST /listing/{id}/view）。

- TMDO_Zone_Warm 新增 VIEW_KEY / VIEW_TTL 常數（值與 AddOn 的
  TMDO_Listing_Stats::VIEW_KEY 完全相同的 'wpdo_views'，指向同一批列，
  無資料遷移）
- CLI benchmark 改用核心常數
- REST 兩個 handler 改走新的 read_view_count() / bump_view_count()：
  AddOn 在場時仍委派過去（保留 hp_view_count postmeta fallback），
  否則核心自己讀寫 warm 列
- wp tmdo cleanup --archive-expired 加守衛，AddOn 缺席時印 warning 並跳過

includes/class-tmdo-rest-api.php

@@ -646,7 +646,7 @@ class TMDO_REST_API {
 			return $err;
 		}
 
-		$views = TMDO_Listing_Stats::get_view_count( $post_id );
+		$views = self::read_view_count( $post_id );
 
 		return new WP_REST_Response(
 			array(
@@ -730,8 +730,8 @@ class TMDO_REST_API {
 		// Mark as counted for this IP/session.
 		set_transient( $rl_key, 1, HOUR_IN_SECONDS );
 
-		TMDO_Listing_Stats::increment_view( $post_id );
-		$views = TMDO_Listing_Stats::get_view_count( $post_id );
+		self::bump_view_count( $post_id );
+		$views = self::read_view_count( $post_id );
 
 		$response = new WP_REST_Response(
 			array(
@@ -1642,4 +1642,37 @@ class TMDO_REST_API {
 		$result = TMDO_Migration_Orchestrator::resume();
 		return new WP_REST_Response( $result, ! empty( $result['ok'] ) ? 200 : 409 );
 	}
+
+	/**
+	 * Read a post's view counter.
+	 *
+	 * Delegates to the HivePress AddOn when it is active, because that class
+	 * adds an hp_view_count postmeta fallback for listings migrated before the
+	 * warm zone existed. Without the AddOn — the normal case for a plain
+	 * install — core reads its own warm row directly. Calling the AddOn class
+	 * unconditionally used to fatal these endpoints on any site without it.
+	 *
+	 * @param int $post_id Post ID.
+	 * @return int
+	 */
+	private static function read_view_count( int $post_id ): int {
+		if ( class_exists( 'TMDO_Listing_Stats' ) ) {
+			return (int) TMDO_Listing_Stats::get_view_count( $post_id );
+		}
+		return (int) ( TMDO_Zone_Warm::get( $post_id, TMDO_Zone_Warm::VIEW_KEY ) ?? 0 );
+	}
+
+	/**
+	 * Increment a post's view counter.
+	 *
+	 * @param int $post_id Post ID.
+	 * @return void
+	 */
+	private static function bump_view_count( int $post_id ): void {
+		if ( class_exists( 'TMDO_Listing_Stats' ) ) {
+			TMDO_Listing_Stats::increment_view( $post_id );
+			return;
+		}
+		TMDO_Zone_Warm::increment( $post_id, TMDO_Zone_Warm::VIEW_KEY, 1, TMDO_Zone_Warm::VIEW_TTL );
+	}
 }

includes/zones/class-tmdo-zone-warm.php

@@ -24,6 +24,19 @@ if ( ! defined( 'ABSPATH' ) ) {
  */
 class TMDO_Zone_Warm {
 
+	/**
+	 * Warm key used for per-post view counters.
+	 *
+	 * Owned by core because the row lives in this zone's table and core's admin,
+	 * CLI and REST layers all read it. The HivePress AddOn's
+	 * TMDO_Listing_Stats::VIEW_KEY carries the identical literal, so the two
+	 * address the same rows — nothing to migrate either way.
+	 */
+	const VIEW_KEY = 'wpdo_views';
+
+	/** TTL applied when core increments the view counter itself. */
+	const VIEW_TTL = DAY_IN_SECONDS;
+
 	/**
 	 * Get the warm table name.
 	 */