6939a835ca
### What? Regression caused by https://github.com/payloadcms/payload/pull/11433 If a beforeChange hook was checking for a missing or undefined `value` in order to change the value before inserting into the database, data could be lost. ### Why? In #11433 the logic for setting the fallback field value was moved above the logic that cleared the value when access control returned false. ### How? This change ensures that the fallback value is passed into the beforeValidate function _and_ still available with the fallback value on siblingData if access control returns false. Fixes https://github.com/payloadcms/payload/issues/11543