docs(arch): amend call specs for ADR-029/030/032/034 — peer-keyed routing, PeerEntry, forwarded-for, three roles
Sync the call crate specs to the accepted ADRs 029-034:
- operation-registry: PeerCompositeEnv (peer-keyed overlays), invoke_peer/
PeerRef routing, retire remote_safe/trusted_peer, AccessControl-based peer
auth, forwarded_for on OperationContext (ADR-029/030/032)
- call-protocol: peer-keyed compose_root_env, forwarded_for in call.requested
payload, build_root_context forwarded_for parameter (ADR-029/032)
- client-and-adapters: CallClient verifier selection by PeerEntry presence,
remote_identity: None load-bearing, three remote roles (ADR-034)
- README: ADR-029/030/032/034 in applicable ADRs table