- Replace hub/spoke with head/worker terminology in call-protocol.md,
auth.md, open-questions.md, napi-and-pubsub.md
- Update operation paths from /{spoke}/{service}/{op} to
/{node}/{service}/{op} throughout call-protocol.md
- Unify Identity struct: auth.md already had {id, scopes, resources},
add note clarifying this is canonical (vs research/services.md which
used {node_id, fingerprint, scopes})
- Update integration-plan.md inconsistencies section to track what's
been fixed (hub/spoke, identity model) and expand service naming
to include external services
- Update call-protocol.md last_updated date
ADRs are intentionally left unchanged as historical records.