feat: Conversation workflow backend changes (#13070)

Extracted the backend changes from
https://github.com/chatwoot/chatwoot/pull/13040

- Added the support for saving `conversation_required_attributes` in
account
- Delete `conversation_required_attributes` if custom attribute deleted.

Co-authored-by: Vinay Keerthi <11478411+stonecharioteer@users.noreply.github.com>

app/models/account.rb

@@ -37,7 +37,11 @@ class Account < ApplicationRecord
         'auto_resolve_message': { 'type': %w[string null] },
         'auto_resolve_ignore_waiting': { 'type': %w[boolean null] },
         'audio_transcriptions': { 'type': %w[boolean null] },
-        'auto_resolve_label': { 'type': %w[string null] }
+        'auto_resolve_label': { 'type': %w[string null] },
+        'conversation_required_attributes': {
+          'type': %w[array null],
+          'items': { 'type': 'string' }
+        }
       },
     'required': [],
     'additionalProperties': true
@@ -55,7 +59,7 @@ class Account < ApplicationRecord
                  attribute_resolver: ->(record) { record.settings }
 
   store_accessor :settings, :auto_resolve_after, :auto_resolve_message, :auto_resolve_ignore_waiting
-  store_accessor :settings, :audio_transcriptions, :auto_resolve_label
+  store_accessor :settings, :audio_transcriptions, :auto_resolve_label, :conversation_required_attributes
 
   has_many :account_users, dependent: :destroy_async
   has_many :agent_bot_inboxes, dependent: :destroy_async

app/models/custom_attribute_definition.rb

@@ -45,6 +45,7 @@ class CustomAttributeDefinition < ApplicationRecord
   belongs_to :account
   after_update :update_widget_pre_chat_custom_fields
   after_destroy :sync_widget_pre_chat_custom_fields
+  after_destroy :cleanup_conversation_required_attributes
 
   private
 
@@ -56,6 +57,13 @@ class CustomAttributeDefinition < ApplicationRecord
     ::Inboxes::UpdateWidgetPreChatCustomFieldsJob.perform_later(account, self)
   end
 
+  def cleanup_conversation_required_attributes
+    return unless conversation_attribute? && account.conversation_required_attributes&.include?(attribute_key)
+
+    account.conversation_required_attributes = account.conversation_required_attributes - [attribute_key]
+    account.save!
+  end
+
   def attribute_must_not_conflict
     model_keys = attribute_model.to_sym == :conversation_attribute ? :conversation : :contact
     return unless attribute_key.in?(STANDARD_ATTRIBUTES[model_keys])