Restructure omni services and add Chatwoot research snapshot

research/chatwoot/app/mailboxes/incoming_email_validity_helper.rb

@@ -0,0 +1,20 @@
+module IncomingEmailValidityHelper
+  private
+
+  def incoming_email_from_valid_email?
+    return false unless valid_external_email_for_active_account?
+
+    # Return if email doesn't have a valid sender
+    # This can happen in cases like bounce emails for invalid contact email address
+    return false unless Devise.email_regexp.match?(@processed_mail.original_sender)
+
+    true
+  end
+
+  def valid_external_email_for_active_account?
+    return false unless @account.active?
+    return false if @processed_mail.notification_email_from_chatwoot?
+
+    true
+  end
+end