Pipeline and Infrastructure

• Document reading — Stage that extracts text blocks, reading order, and position information from a receipt image or PDF input. See: 02.
• Structured extraction — Model-independent stage that converts document-reading output into the ReceiptExtraction schema. See: 02.
• Model routing — Operational policy that selects the structured-extraction engine. Provider list and routing policy are managed in the internal operations layer. See: 02.
• Indexer — Monitoring component that carries on-chain events into application-readable form. See: 01 and 05.
• Timelock — Delayed-execution class applied to authority-impacting operations between queue and execution. Duration and procedure are operational. See: 04.