R1: no GC service calls this route. Its shape (caller-supplied facts handed
straight to issueAccessClaim) is a second entitlement authority even when
gated, so authenticating it would preserve the oracle behind a password.
Deletion-only commit: route, discovery advertisement, mapper, contract type,
positive test, and doc mentions in architecture.md/service-contract.md/
fresh-workspace-handoff.md.
a999d48b6d