Support Rails 8.1 Events (structured logging)

[fallwith]

As per rails/rails#50452, Rails 8 intends to introduce structured logging. We ought to ensure that our log forwarding and decoration works with the new logger.

Rails World talk about this feature: https://www.youtube.com/watch?v=JK90_2L_NUM

[workato-integration]

https://new-relic.atlassian.net/browse/NR-294488

[kaylareopelle]

This feature has been moved to Rails 8.1