WooCommerce Subscriptions 6.9.0

* Fix: Prevent errors during checkout when a customer is switching their subscription product and does not require payment.
* Dev: Update subscriptions-core to 7.4.3.

* Fix: Resolved an issue where simple product prices were incorrectly set to $0 when purchasing subscriptions and simple products with a coupon in WC 9.2.
* Dev: Update subscriptions-core to 7.4.2.

* Fix: Resolve duplicate subscription creation and PHP warning when switching subscriptions with Prepaid for WooCommerce Subscriptions plugin active.
* Fix: Switch calculations now exclude previous switch orders with a checkout-draft status.
* Dev: Introduce new parameter to WC_Subscription::get_last_order() to enable filtering out orders with specific statuses.
* Update: Schedule subscription-related events with a priority of 1 to allow for earlier execution within the Action Scheduler.
* Fix: Ensure admin notices are displayed after performing bulk actions on subscriptions when HPOS is enabled.
* Fix: Add a year to the next renewal date billing interval is 12 months or more for a synced subscription.
* Dev: Added filter to enable overriding the total paid for current switch period.
* Dev: Updated subscriptions-core to 7.4.1.