Restructure omni services and add Chatwoot research snapshot

research/chatwoot/app/controllers/api/v1/accounts/whatsapp/authorizations_controller.rb

@@ -0,0 +1,77 @@
+class Api::V1::Accounts::Whatsapp::AuthorizationsController < Api::V1::Accounts::BaseController
+  before_action :fetch_and_validate_inbox, if: -> { params[:inbox_id].present? }
+
+  # POST /api/v1/accounts/:account_id/whatsapp/authorization
+  # Handles both initial authorization and reauthorization
+  # If inbox_id is present in params, it performs reauthorization
+  def create
+    validate_embedded_signup_params!
+    channel = process_embedded_signup
+    render_success_response(channel.inbox)
+  rescue StandardError => e
+    render_error_response(e)
+  end
+
+  private
+
+  def process_embedded_signup
+    service = Whatsapp::EmbeddedSignupService.new(
+      account: Current.account,
+      params: params.permit(:code, :business_id, :waba_id, :phone_number_id).to_h.symbolize_keys,
+      inbox_id: params[:inbox_id]
+    )
+    service.perform
+  end
+
+  def fetch_and_validate_inbox
+    @inbox = Current.account.inboxes.find(params[:inbox_id])
+    validate_reauthorization_required
+  end
+
+  def validate_reauthorization_required
+    return if @inbox.channel.reauthorization_required? || can_upgrade_to_embedded_signup?
+
+    render json: {
+      success: false,
+      message: I18n.t('inbox.reauthorization.not_required')
+    }, status: :unprocessable_entity
+  end
+
+  def can_upgrade_to_embedded_signup?
+    channel = @inbox.channel
+    return false unless channel.provider == 'whatsapp_cloud'
+
+    true
+  end
+
+  def render_success_response(inbox)
+    response = {
+      success: true,
+      id: inbox.id,
+      name: inbox.name,
+      channel_type: 'whatsapp'
+    }
+    response[:message] = I18n.t('inbox.reauthorization.success') if params[:inbox_id].present?
+    render json: response
+  end
+
+  def render_error_response(error)
+    Rails.logger.error "[WHATSAPP AUTHORIZATION] Embedded signup error: #{error.message}"
+    Rails.logger.error error.backtrace.join("\n")
+    render json: {
+      success: false,
+      error: error.message
+    }, status: :unprocessable_entity
+  end
+
+  def validate_embedded_signup_params!
+    missing_params = []
+    missing_params << 'code' if params[:code].blank?
+    missing_params << 'business_id' if params[:business_id].blank?
+    missing_params << 'waba_id' if params[:waba_id].blank?
+
+    return if missing_params.empty?
+
+    raise ArgumentError, "Required parameters are missing: #{missing_params.join(', ')}"
+  end
+end