Restructure omni services and add Chatwoot research snapshot

research/chatwoot/app/controllers/api/v1/notification_subscriptions_controller.rb

@@ -0,0 +1,25 @@
+class Api::V1::NotificationSubscriptionsController < Api::BaseController
+  before_action :set_user
+
+  def create
+    notification_subscription = NotificationSubscriptionBuilder.new(user: @user, params: notification_subscription_params).perform
+
+    render json: notification_subscription
+  end
+
+  def destroy
+    notification_subscription = NotificationSubscription.where(["subscription_attributes->>'push_token' = ?", params[:push_token]]).first
+    notification_subscription.destroy! if notification_subscription.present?
+    head :ok
+  end
+
+  private
+
+  def set_user
+    @user = current_user
+  end
+
+  def notification_subscription_params
+    params.require(:notification_subscription).permit(:subscription_type, subscription_attributes: {})
+  end
+end