Agree the Auctioneer host contract #1509

Description

Answer IABTechLab/auctioneer#34 from the Trusted Server side, so Auctioneer builds its in-process bridge against a contract both projects accept. The answer covers the EdgeZero revision and host interface (the PR 275 candidate from #1507), the deployment target, the bidder set, which project owns each part, configuration, consent and identity sources, results, errors, cancellation, and resource budgets.

Done when

• Trusted Server's answers are posted on Review the pinned Trusted Server local-provider contract auctioneer#34 and accepted there.
• Any contract point that changes Trusted Server's auction orchestrator is written into a Trusted Server spec.

Affected area

Core (Edge Cookies, GDPR), Integrations

Related

• Epic: Integrate Auctioneer into Trusted Server on EdgeZero PR 275 #1505
• Auctioneer: Review the pinned Trusted Server local-provider contract auctioneer#34
• Shapes the provider seam: Core's auction speaks OpenRTB #1336