Hotfix RSPEC tests upon ActiveRecord gem update

[arielr-lt]

Motivation:

See the (first bullet in) CHANGELOG for activerecord gem: https://github.com/rails/rails/blob/v8.0.2.1/activerecord/CHANGELOG.md

CVE-2025-55193 Detail

Active Record connects classes to relational database tables. Prior to versions 7.1.5.2, 7.2.2.2, and 8.0.2.1, the ID passed to find or similar methods may be logged without escaping. If this is directly to the terminal it may include unescaped ANSI sequences. This issue has been patched in versions 7.1.5.2, 7.2.2.2, and 8.0.2.1.

• In 8.0.2, ActiveRecord raised:
  • raise(... "Couldn't find #{name} with '#{primary_key}'=#{id}")
  • String IDs appeared unquoted (…=wtf).
• In 8.0.2.1, it switched to:
  • raise(... "Couldn't find #{name} with '#{primary_key}'=#{id.inspect}")
  • String IDs are now quoted (…="wtf"), because inspect adds quotes for strings.

Changes:

• Standardized 404 errors: Added a global rescue for ActiveRecord::RecordNotFound to return “ not found” (app/api/base.rb)
• Updated specs to assert on this stable message.

Benefits:

• Decouples your API from upstream message format changes (like the 8.0.2 → 8.0.2.1 switch to
  id.inspect).
• Presents consistent, user-friendly errors.