Follow-up to the previous commit's notifier behavior change. Two test fixes:
1. `tests/gateway/test_kanban_notifier.py` gains
`test_notifier_redelivers_same_kind_on_dispatch_cycle` — pins the new
contract directly: a task that crashes, gets reclaimed, and crashes
again notifies the user BOTH times. Before #21398 the second crash
silently dropped because the subscription was already deleted.
2. `tests/hermes_cli/test_kanban_notify.py::
test_notifier_unsubs_after_abnormal_events[gave_up|crashed|timed_out]`
is flipped. Those tests were added in the salvage of #22941 and
asserted the OLD behavior (subscription deleted after gave_up /
crashed / timed_out). They're now obsolete — the new contract is
"subscription survives a non-final terminal event so retries reach
the user." Updated docstring + asserts; the cursor-advance check is
added to confirm the dedup mechanism still works.
The `test_notifier_unsubs_after_completed_event` test stays untouched
because `completed` IS still a terminal event that triggers unsub
(the task hits `done` status, which is handled by the `task_terminal`
branch in the notifier loop).
Two follow-up improvements to the previous commit's notifier dedup work.
1. Add a regression test for the send-exception rewind path. The
contributor's PR included a test for the adapter-disconnect path
(test_kanban_notifier_rewinds_claim_if_adapter_disconnects, where
adapter is None at delivery time), but not for the "adapter is
connected, send() raises" path that fires inside the inner try/except
at gateway/run.py:4314. The new test
(test_kanban_notifier_rewinds_claim_on_send_exception) uses a
FailingAdapter that always raises and confirms (a) send was actually
attempted, (b) the claim was rewound, (c) the next call to
unseen_events_for_sub still returns the event for retry.
2. Drop the per-delivery success log from INFO to DEBUG. A busy board
on a multi-platform gateway can produce hundreds of these per day;
that's gateway.log noise that obscures real warnings. Failure paths
stay at WARNING (where you'd want to look when something's wrong)
so we don't lose visibility into transient send issues.
