Discus adoption of #NoDiscard and PHP 8.5

Problem/Motivation

Post 11.2 release PHP 8.5 will begin to 3 month to RC stage but some RFC are already merged
There's symfony/polyfill-php85 could be added with NoDiscard RFC for batching

https://wiki.php.net/rfc/marking_return_value_as_important

Steps to reproduce

https://github.com/symfony/polyfill-php85

Proposed resolution

As CI already running 8.5 enable the polyfill

Remaining tasks

- discus adoption of PHP 8.5 as the first alpha Jul 03 2025

User interface changes

Introduced terminology

API changes

Data model changes

Release notes snippet