Add support for cache collector for state in core

This is fixed for 2.x and will now be back ported to 1.1.x

Are you sure it's good idea to extend the core state class? What exactly is the purpose of this, does caching really make sense combined with that timestamp business?

Setting undefined properties will give you PHP deprecation warnings on 10.2

You're right, thanks. The tests for ECA 1.1 with Drupal 10.2 have been failing too for that matter. I've fixed that such that for ECA 1.1 we do inject the extra services but don't do anything with them. That way, this code works for Drupal 10.2 and 10.3 likewise.

Automatically closed - issue fixed for 2 weeks with no activity.