Restructure omni services and add Chatwoot research snapshot

research/chatwoot/app/services/messages/status_update_service.rb

@@ -0,0 +1,34 @@
+class Messages::StatusUpdateService
+  attr_reader :message, :status, :external_error
+
+  def initialize(message, status, external_error = nil)
+    @message = message
+    @status = status
+    @external_error = external_error
+  end
+
+  def perform
+    return false unless valid_status_transition?
+
+    update_message_status
+  end
+
+  private
+
+  def update_message_status
+    # Update status and set external_error only when failed
+    message.update!(
+      status: status,
+      external_error: (status == 'failed' ? external_error : nil)
+    )
+  end
+
+  def valid_status_transition?
+    return false unless Message.statuses.key?(status)
+
+    # Don't allow changing from 'read' to 'delivered'
+    return false if message.read? && status == 'delivered'
+
+    true
+  end
+end