A background job opens one wide event for its whole run, and the per-request
memo cached the operator switches, module availability, module preferences,
provider presence and consent kinds on it. The nightly status passes loop
over every candidate inside that one event, so a switch turned off mid-run
did not stop the remaining users, and the wire re-check read the same cached
answer.
memoizePerRequest takes a freshInBackground option; every input that decides
whether AI work may run sets it, so a background caller reads them on every
call while a request still reads them once.
