Rails/Delagate gets confused by private class methods

[Darhazer]

Given the code:

class A
  class << self
    private

    def foo
    end
  end

  def bar
    baz.bar
  end
end

Rails/Delegate doesn't produce an offence for def bar. Removing the private on line 3 however correctly triggers the cop. Note that the bar method itself is not private.

---

Expected behavior

An offence for the delegation. Inner classes' private declarations should be ignored when checking whether this is a private delegation. Note that this also would be ignored while it should not:

class A
  class B
    private

    def foo
    end
  end

  def bar
    baz.bar
  end
end

Actual behavior

no offences detected

Steps to reproduce the problem

This is extremely important! Providing us with a reliable way to reproduce
a problem will expedite its solution.

RuboCop version

Include the output of rubocop -V or bundle exec rubocop -V if using Bundler. Here's an example:
You can see extension cop versions (e.g. rubocop-rails, rubocop-performance, and others) output by rubocop -V,
include them as well. Here's an example:

$ [bundle exec] rubocop -V
rubocop -V
1.30.1 (using Parser 3.1.2.0, rubocop-ast 1.18.0, running on ruby 3.1.2 arm64-darwin21)
  - rubocop-performance 1.14.1
  - rubocop-rails 2.14.2
  - rubocop-rake 0.6.0
  - rubocop-rspec 2.11.1