Restructure omni services and add Chatwoot research snapshot

research/chatwoot/app/controllers/webhooks/shopify_controller.rb

@@ -0,0 +1,35 @@
+class Webhooks::ShopifyController < ActionController::API
+  before_action :verify_hmac!
+
+  def events
+    case request.headers['X-Shopify-Topic']
+    when 'shop/redact'
+      handle_shop_redact
+    end
+
+    head :ok
+  end
+
+  private
+
+  def verify_hmac!
+    secret = GlobalConfigService.load('SHOPIFY_CLIENT_SECRET', nil)
+    return head :unauthorized if secret.blank?
+
+    data = request.body.read
+    request.body.rewind
+
+    hmac_header = request.headers['X-Shopify-Hmac-SHA256']
+    return head :unauthorized if hmac_header.blank?
+
+    computed = Base64.strict_encode64(OpenSSL::HMAC.digest('SHA256', secret, data))
+    return head :unauthorized unless ActiveSupport::SecurityUtils.secure_compare(computed, hmac_header)
+  end
+
+  def handle_shop_redact
+    shop_domain = params[:shop_domain]
+    return if shop_domain.blank?
+
+    Integrations::Hook.where(app_id: 'shopify', reference_id: shop_domain).destroy_all
+  end
+end