The gateway is the RPC entry point to SubmitQueue. It accepts Land, Cancel, GetRequestSummaryByID, GetRequestSummaryByChangeURI, List, GetRequestHistoryByID, GetRequestHistoryByChangeURI, and Ping calls. It validates edge-owned input and hands asynchronous work to the orchestrator through the message queue.

Land creates gateway-owned receipt projections before publishing the request:

• An authoritative request summary keyed by sqid.
• One exact change-URI mapping per submitted URI.
• A queue-ordered receipt projection used by List.

GetRequestSummaryByID and GetRequestSummaryByChangeURI read authoritative summaries. List reads the queue projection and may briefly lag those summaries while eventual repair converges.

The gateway owns the request log read model and is the only service that reads it.

• For statuses produced synchronously by the gateway, such as accepted on Land and cancelling on Cancel, the gateway persists the event through the shared request-log materializer before returning or publishing.
• For statuses produced downstream, the orchestrator publishes entries to the log topic through submitqueue/core/request.PublishLog. The gateway consumes that topic and persists each entry through the same materializer.
• Orchestrator DLQ reconciliation materializes terminal repairs directly so the DLQ delivery remains unacknowledged until the log and public projections converge.
• GetRequestHistoryByID and GetRequestHistoryByChangeURI read retained request-log rows directly.

The materializer appends every audit event, selects the current authoritative winner, and repairs the queue projection. The normal orchestrator pipeline does not read or write the request-log store directly.