feat(2meet-data-optimizer-hivepress-addon): register Hot-only HivePress fields as entity groups

- New scoped post groups for fields only the Hot zone covered (ADR-003):
  hp_draft_flags (hp_listing, hp_request: hp_drafted), hp_booking_core,
  hp_membership_plan_core, hp_membership_core. hp_drafted lives in one group
  spanning both post types, so it adds no shared key.
- New groups register before the existing ones: the legacy (unscoped)
  owner of hp_expired_time stays hp_request_core; existing hashes unchanged.
- Reconciler now also plans hp_membership rows of hp_expired_time out of
  hp_request_core. dev20-22 hold 0 native rows for these keys.
- Verify: HP unit 151 / integration 49 green, phpcs clean
- PR: PR-036

includes/class-tmdo-hivepress-entity-groups.php

@@ -8,6 +8,14 @@
  *   post:hp_vendor_core  → wp_wpdo_post_hp_vendor_core  (hp_vendor)
  *   user:hp_user         → wp_wpdo_user_hp_user
  *
+ * Fields only the Hot zone used to cover (ADR-003), as their own groups:
+ *   post:hp_draft_flags          (hp_listing, hp_request)
+ *   post:hp_booking_core         (hp_booking)
+ *   post:hp_membership_plan_core (hp_membership_plan)
+ *   post:hp_membership_core      (hp_membership)
+ * They register FIRST so the legacy last-registered owner of hp_expired_time
+ * stays hp_request_core.
+ *
  * The term/comment groups (hp_taxonomy, hp_review) live in
  * TMDO_Hivepress_Term_Comment_Fields.
  *
@@ -60,6 +68,10 @@ final class TMDO_HivePress_Entity_Groups {
 			return;
 		}
 
+		self::register_hp_draft_flags_group();
+		self::register_hp_booking_core_group();
+		self::register_hp_membership_plan_core_group();
+		self::register_hp_membership_core_group();
 		self::register_hp_listing_core_group();
 		self::register_hp_request_core_group();
 		self::register_hp_vendor_core_group();
@@ -68,6 +80,106 @@ final class TMDO_HivePress_Entity_Groups {
 
 	// ── Group definitions ────────────────────────────────────────────────────
 
+	/**
+	 * Draft flag shared by listings and requests (user-dashboard filtering).
+	 *
+	 * @return void
+	 */
+	private static function register_hp_draft_flags_group(): void {
+		TMDO_Entity_Registry::register_group(
+			'post',
+			'hp_draft_flags',
+			array(
+				array(
+					'key'        => 'hp_drafted',
+					'type'       => 'integer',
+					'searchable' => true,
+					'label'      => 'Drafted flag (0/1)',
+				),
+			),
+			array( 'post_types' => array( 'hp_listing', 'hp_request' ) )
+		);
+	}
+
+	/**
+	 * HivePress Bookings (post_type=hp_booking): slot-availability lookups.
+	 *
+	 * @return void
+	 */
+	private static function register_hp_booking_core_group(): void {
+		TMDO_Entity_Registry::register_group(
+			'post',
+			'hp_booking_core',
+			array(
+				array(
+					'key'        => 'hp_start_time',
+					'type'       => 'integer',
+					'searchable' => true,
+					'label'      => 'Booking start unix ts',
+				),
+				array(
+					'key'        => 'hp_end_time',
+					'type'       => 'integer',
+					'searchable' => true,
+					'label'      => 'Booking end unix ts',
+				),
+				array(
+					'key'   => 'hp_quantity',
+					'type'  => 'integer',
+					'label' => 'Places booked',
+				),
+			),
+			array( 'post_types' => array( 'hp_booking' ) )
+		);
+	}
+
+	/**
+	 * HivePress Memberships plan (post_type=hp_membership_plan).
+	 *
+	 * @return void
+	 */
+	private static function register_hp_membership_plan_core_group(): void {
+		TMDO_Entity_Registry::register_group(
+			'post',
+			'hp_membership_plan_core',
+			array(
+				array(
+					'key'   => 'hp_expire_period',
+					'type'  => 'integer',
+					'label' => 'Plan expiry period (days)',
+				),
+				array(
+					'key'        => 'hp_primary',
+					'type'       => 'integer',
+					'searchable' => true,
+					'label'      => 'Primary plan flag (0/1)',
+				),
+			),
+			array( 'post_types' => array( 'hp_membership_plan' ) )
+		);
+	}
+
+	/**
+	 * HivePress Memberships subscription (post_type=hp_membership).
+	 *
+	 * @return void
+	 */
+	private static function register_hp_membership_core_group(): void {
+		TMDO_Entity_Registry::register_group(
+			'post',
+			'hp_membership_core',
+			array(
+				array(
+					'key'        => 'hp_expired_time',
+					'type'       => 'integer',
+					'searchable' => true,
+					'label'      => 'Expiry unix ts',
+				),
+			),
+			array( 'post_types' => array( 'hp_membership' ) )
+		);
+	}
+
 	/**
 	 * HivePress listing core meta keys (post_type=hp_listing).
 	 * Aligns with the existing wpdo_hot_hp_listing flat table; v2.9.5 will