fix(ERP-252): extract fillDeliveryAddressFallback method, eliminate duplication

fix(ERP-252): extract fillDeliveryAddressFallback method, eliminate duplication

- New method fillDeliveryAddressFallback() handles 3 raw_data formats:
  1) string (FlowWow text) → parseAddressFromDeliveryText()
  2) array with address (YM API JSON) → extract structured fields
  3) null/missing → defaults "Уточняется"
- Replaced 3 inline fallback blocks with single method call
- Fixed surprise-delivery parsing ("Отправим смс получателю...")
- 20 unit tests, 115 assertions — all passing

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>