run_job() submits SessionDB() to a one-worker executor and abandons the
worker (shutdown(wait=False)) when init exceeds the cron timeout. If the
constructor later completes inside that abandoned worker, the Future's
result — an open SessionDB holding .db/WAL/SHM handles — was orphaned and
never closed, leaking descriptors until EMFILE. Attach a done-callback on
the timeout path that retrieves and closes any eventual late result.
Salvage note: the lazy-recall ownership half of #72822 (_owns_session_db
tracked on AIAgent, owned handle closed in close()) already landed on main;
this carries the remaining cron timeout-abandon half with its regression
test.
Tranquil-Flow
38709ae6f2