will_retry gated notice suppression on recurring/paused/attempt/config only.
plan_retry has a yield branch: when the schedule's own next occurrence is at or
before the pending ladder rung it schedules nothing and clears state without
consuming an attempt. For a job on a cadence at or under a rung (<=5m, and the
15m/30m rungs for faster cadences) every failure hit that branch, the attempt
counter never advanced, and will_retry kept answering True — so during a
sustained outage every failure notice was held forever. The documented escape
('once the ladder is exhausted, the next failure alerts normally') was
unreachable: the ladder could never exhaust.
will_retry now recomputes the natural next occurrence exactly as
_advance_after_run will and answers True only when the rung precedes it — i.e.
exactly when plan_retry will actually park a re-run. Notices now go out on the
first failure for cadences the ladder cannot help, and slow jobs keep their
silent bounded re-runs.
(cherry picked from commit 9d3d6006204269103188a5ee366d8eb7c9f482a2)
a31e3a6b94