Upgrade to Ruby 3.4.1

[coalest]

Doesn't resolve any issue.

Description

• Upgrade Ruby version to 3.4.1
• Update other gems that now produce deprecation warnings (yard and prawn-rails), related to ostruct being removed from the standard library at some point in the future.

[coalest]

We still get a deprecation warning for pry on version 0.14. Upgrading to 0.15 would remove the warning, but pry-nav doesn't support 0.15 so we can't upgrade yet. I created a PR upstream because it doesn't seem like there is any reason pry-nav shouldn't support pry versions >0.15.

pry-nav seems kinda abandoned though. If someone wants those features they could use ruby/debug instead, but I don't want to remove it and potentially mess with someone's workflow.

[dorner]

@coalest thanks for this - unfortunately because we're using Cloud66, we can't just upgrade the Ruby version. We have to deploy a new version of the application. We'll need to schedule this to do it "right". But we can use this PR to get it done.

@cielf let's see if we can schedule this for January!

[coalest]

@dorner Figured it might not be that simple.

Btw is there any plan for upgrading Postgres to a newer version?

[dorner]

We recently moved to AWS and we should be on Postgres 16.3 now.

[cielf]

Per discussions in the planning meeting - there are other infrastructure tasks we want to complete first.