兼容接入订单租期字段

backend/migrations/000001_init.sql

@@ -78,6 +78,8 @@ CREATE TABLE rental_orders (
   account_id BIGINT UNSIGNED NOT NULL,
   owner_id BIGINT UNSIGNED NOT NULL,
   renter_id BIGINT UNSIGNED NOT NULL,
+  rented_at DATETIME NULL,
+  estimated_duration_hours INT NOT NULL DEFAULT 24,
   rent_start_at DATETIME NULL,
   rent_end_at DATETIME NULL,
   rent_hours INT NOT NULL,
@@ -95,7 +97,8 @@ CREATE TABLE rental_orders (
   UNIQUE KEY uk_rental_orders_order_no (order_no),
   KEY idx_rental_orders_renter_status (renter_id, status),
   KEY idx_rental_orders_owner_status (owner_id, status),
-  KEY idx_rental_orders_listing_id (listing_id)
+  KEY idx_rental_orders_listing_id (listing_id),
+  KEY idx_rental_orders_rented_at (status, rented_at)
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
 
 CREATE TABLE handoff_records (