Prove Auctioneer equivalence on the Trusted Server artifact #1512

Description

Provide the host-side harness and the controlled display flow that IABTechLab/auctioneer#91 runs, so embedded Auctioneer can be shown to produce the same results on the Trusted Server artifact as standalone Auctioneer.

Done when

• The harness and the controlled flow run against the Trusted Server artifact, in CI or as a documented local run.
• Prove standalone/embedded equivalence and the controlled host flow auctioneer#91 records the equivalence result.

Affected area

Core (Edge Cookies, GDPR), Integrations, CI / Tooling

Related

• Epic: Integrate Auctioneer into Trusted Server on EdgeZero PR 275 #1505
• Auctioneer: Prove standalone/embedded equivalence and the controlled host flow auctioneer#91
• Depends on: Run Auctioneer in-process as a local auction provider #1511