Evolve topology_runs into a durable-job table (migration 0009): status state
machine (queued/running/completed/failed/cancelled), kind, input graph,
per-step checkpoint, error, last_event_id, timestamps. comparison becomes
nullable (the result blob, absent until completion). Back-compat: existing
rows default to completed/compare.
cm-db repo gains the durable-job ops: enqueue_run, claim_next_queued (CAS via
FOR UPDATE SKIP LOCKED), checkpoint, complete, fail, requeue_stale (resume
sweep), and status(). Regenerated .sqlx cache. Also fix two pre-existing test
RuntimeConfig literals missing the providers field (from the registry work).
Co-Authored-By: Claude Opus 4.8 <[email protected]>
