Agent performance as the session record tells it [read]

For every harness and model the caller's visible sessions ran on, created between since and until (default the last 30 days): sessions and their sources; decisions people recorded (adopted; votes won, lost and undecided; rerun, revise, discard; did_the_job and approve yes/no); outcomes by kind; sessions nobody decided on; total and median spend in USD micros. A read model rebuilt on each request from the record marks — nothing is stored, nothing is inferred: a session without a human.decision is undecided. See docs/asteroids/architecture/session-record.md.