Paid Memberships Pro Version History

* SECURITY: Gated the unverified Stripe webhook event fallback behind a new `pmpro_stripe_webhook_allow_unverified_post_event` filter, which defaults to `false`. #3592 (@dparker1005)
* ENHANCEMENT: Updated links to the Member Directory and Podcasting Use Case landing pages and hubs. #3593 (@kimcoleman)
* ENHANCEMENT: Added a new `pmpro_memberships_widget_periods` filter to allow customizing the time periods shown in the Memberships Report widget. (@kimcoleman)
* ENHANCEMENT: Added a new icon for the PMPro Kit Add On. #3575 (@kimcoleman)
* ENHANCEMENT: Now clearing the object cache when user fields are created, updated, or deleted to ensure changes show immediately when using persistent object caching. #3565 (@dalemugford)
* ENHANCEMENT: Updated the WP Fusion Lite integration through v3.47.6. #3583 (@dparker1005)
* BUG FIX/ENHANCEMENT: Now ignoring PayPal error code 11556 when cancelling a subscription that is already inactive to avoid unnecessary admin notifications. #3572 (@dparker1005)
* BUG FIX: Fixed an issue where the field group description was not showing due to an incorrect variable reference. #3591 (@mircobabini)
* BUG FIX: Fixed an issue where failed Stripe recurring payment orders were missing card info and billing address data. #3590 (@dparker1005)
* BUG FIX: Fixed an issue where the membership level billing amount could be recalculated incorrectly when processing checkout via webhook, potentially losing discount code pricing. #3585 (@dparker1005)
* BUG FIX: Fixed an issue where the timestamp for new orders created in the admin could default to 1970 when the site timezone is not UTC. #3582 (@dparker1005)
* BUG FIX: Resolved PHP 8.5+ deprecation warnings for non-canonical cast names. #3560 (@dwanjuki)

* Performance improvements when bulk cancelling actions.
* Dev-related fixes.

* Use `_doing_it_wrong` in initialization check.