Backend: Fix inclusion validation for CI entries

As we realized in !101350 (merged);

We have the "inclusion" validation for the when keyword but no validation for its type. So, the attribute also accepts an array as the value. The "inclusion" validation of ActiveModel::Validations also accepts array values and compares each element.

class MyTestClass
  include ActiveModel::Validations

  attr_accessor :title

  validates_inclusion_of :title, in: %w[abc def]
end

t = MyTestClass.new
t.title = 'abc'
t.valid? # => true

t.title = 'ghi'
t.valid? # => false

t.title = ['abc']
t.valid? # => true

We fixed that problem in that MR for the Entry::Job and Entry::Bridge entries. In this issue, we'll check other CI entries. For example; we have other when attributes for Entry::Change and Entry::Artifacts.

Implementation

backend	MR
Fix inclusion validation for CI entries (Fixed entries Entry::Artifacts and Entry::Cache)	!105149 (merged)