Add and apply Rails/EnumHash rubocop rule

In rubocop-rails 2.26.0, support was added for Rails 7 syntax in the
Rails/EnumHash rule. We took this opportunity to ensure consistency
by converting all enums to hash with integer values. This format minimizes
the risk of data consistency issues in the database when adding new values.

.rubocop.yml

@@ -388,6 +388,9 @@ Rails/DynamicFindBy:
     - find_by_slug_or_id!
     - find_by_manager_login
 
+Rails/EnumHash:
+  Enabled: true
+
 Rails/EnumSyntax:
   Enabled: true
 

app/models/dashboard/action.rb

@@ -9,7 +9,7 @@ class Dashboard::Action < ApplicationRecord
                               class_name: "Dashboard::ExecutedAction"
   has_many :proposals, through: :executed_actions
 
-  enum :action_type, [:proposed_action, :resource]
+  enum :action_type, { proposed_action: 0, resource: 1 }
 
   validates :title, presence: true, allow_blank: false, length: { in: 4..80 }
 

app/models/progress_bar.rb

@@ -2,7 +2,7 @@ class ProgressBar < ApplicationRecord
   self.inheritance_column = nil
   RANGE = (0..100)
 
-  enum :kind, %i[primary secondary]
+  enum :kind, { primary: 0, secondary: 1 }
 
   belongs_to :progressable, polymorphic: true
 

app/models/sdg/phase.rb

@@ -1,6 +1,6 @@
 class SDG::Phase < ApplicationRecord
   include Cardable
-  enum :kind, %w[sensitization planning monitoring]
+  enum :kind, { sensitization: 0, planning: 1, monitoring: 2 }
   validates :kind, presence: true, uniqueness: true
 
   def self.[](kind)

app/models/tenant.rb

@@ -1,5 +1,5 @@
 class Tenant < ApplicationRecord
-  enum :schema_type, %w[subdomain domain]
+  enum :schema_type, { subdomain: 0, domain: 1 }
 
   validates :schema,
             presence: true,

app/models/votation_type.rb

@@ -3,7 +3,7 @@ class VotationType < ApplicationRecord
 
   QUESTIONABLE_TYPES = %w[Poll::Question].freeze
 
-  enum :vote_type, %w[unique multiple]
+  enum :vote_type, { unique: 0, multiple: 1 }
 
   validates :questionable, presence: true
   validates :questionable_type, inclusion: { in: ->(*) { QUESTIONABLE_TYPES }}