Restructure omni services and add Chatwoot research snapshot

research/chatwoot/app/mailboxes/reply_mailbox.rb

@@ -0,0 +1,41 @@
+class ReplyMailbox < ApplicationMailbox
+  attr_accessor :conversation, :processed_mail
+
+  before_processing :find_conversation
+
+  def process
+    # Return early if no conversation was found (e.g., notification emails, suspended accounts)
+    return unless @conversation
+
+    # Wrap everything in a transaction to ensure atomicity
+    # This prevents orphan conversations if message/attachment creation fails
+    # and ensures idempotency on job retry (conversation won't be duplicated)
+    ActiveRecord::Base.transaction do
+      persist_conversation_if_needed
+      decorate_mail
+      create_message
+      add_attachments_to_message
+    end
+  end
+
+  private
+
+  def find_conversation
+    @conversation = Mailbox::ConversationFinder.new(mail).find
+    # Log when email is rejected
+    Rails.logger.info "Email #{mail.message_id} rejected - no conversation found" unless @conversation
+  end
+
+  def persist_conversation_if_needed
+    # Save the conversation if it's a new record (from NewConversationStrategy)
+    # We persist here instead of in the strategy to maintain transaction integrity
+    return unless @conversation.new_record?
+
+    @conversation.save!
+    Rails.logger.info "Created new conversation #{@conversation.id} for email #{mail.message_id}"
+  end
+
+  def decorate_mail
+    @processed_mail = MailPresenter.new(mail, @conversation.account)
+  end
+end