The cop Rails/EnumSyntax works for a file placed in the app/ folder, but not for one in the lib/ folder.

Expected behavior

Given this configuration

# .rubocop.yml
plugins:
  - rubocop-rails

Rails/EnumSyntax:
  Enabled: true
  Severity: error

I expect that the following code yields an offense

# lib/enum_lib.rb
class EnumerableInLib # rubocop:disable Style/Documentation,Style/FrozenStringLiteralComment
  enum status: { active: 0, archived: 1 }
end

The auto-corrected code should read:

# lib/enum_lib.rb
class EnumerableInLib # rubocop:disable Style/Documentation,Style/FrozenStringLiteralComment
  enum :status, { active: 0, archived: 1 }
end

Actual behavior

If the Ruby file is placed inside the app/ folder, the violation is detected, however not if placed in the lib/ folder.

Steps to reproduce the problem

See my reproduction and its Readme.

RuboCop version

1.75.4 (using Parser 3.3.8.0, Prism 1.4.0, rubocop-ast 1.44.1, analyzing as Ruby 3.3, running on ruby 3.3.8) [x86_64-linux]
  - rubocop-rails 2.31.0