The instances route now passes the owner trail note, so an organization
instance change appends the actions.jsonl line the README promises (P3).
The README claimed no agent reaches the F3 controls. On a dev local owner
Console that is false: every local request acts as the owner, which the
pinned startup warning already says. The README now states it and names
sign-in as the boundary; a local-agent peer refusal is a follow-up (P1).