Add container reference for update tracking using a Carrier code.

Adds container Reference(s) for Update Payload tracking using a given bill of lading number as the primary identifier. Upon creation, the system will identify all containers belonging to the provided bill of lading and create a container Reference for each, to track each container individually. Each container Reference will have the original bill of lading reference_id set as the parent_reference_id attribute.

"Automatic Carrier Identification" (ACI) attempts to find the correct steamship line and begin tracking updates. If a Carrier is found: The Reference will be treated as a Reference via Carrier Code and the carrier_code attribute will be updated to reflect the found carrier code. If a Carrier is not found: The Reference's last_update_status attribute will be set to aci_not_found.