Restructure omni services and add Chatwoot research snapshot

research/chatwoot/enterprise/app/services/contacts/company_association_service.rb

@@ -0,0 +1,47 @@
+class Contacts::CompanyAssociationService
+  def associate_company_from_email(contact)
+    return nil if skip_association?(contact)
+
+    company = find_or_create_company(contact)
+    if company
+      # rubocop:disable Rails/SkipsModelValidations
+      # Using update_column and increment_counter to avoid triggering callbacks while maintaining counter cache
+      contact.update_column(:company_id, company.id)
+      Company.increment_counter(:contacts_count, company.id)
+      # rubocop:enable Rails/SkipsModelValidations
+    end
+    company
+  end
+
+  private
+
+  def skip_association?(contact)
+    return true if contact.company_id.present?
+    return true if contact.email.blank?
+
+    detector = Companies::BusinessEmailDetectorService.new(contact.email)
+    return true unless detector.perform
+
+    false
+  end
+
+  def find_or_create_company(contact)
+    domain = extract_domain(contact.email)
+    company_name = derive_company_name(contact, domain)
+
+    Company.find_or_create_by!(account: contact.account, domain: domain) do |company|
+      company.name = company_name
+    end
+  rescue ActiveRecord::RecordNotUnique
+    # If another process created it first, just find that
+    Company.find_by(account: contact.account, domain: domain)
+  end
+
+  def extract_domain(email)
+    email.split('@').last&.downcase
+  end
+
+  def derive_company_name(contact, domain)
+    contact.additional_attributes&.dig('company_name') || domain.split('.').first.tr('-_', ' ').titleize
+  end
+end