atoms, probe answers and batched calls keep calling after a permanent provider error #708

The per-call catch that #677 fixed in novelty routing exists elsewhere without a dokimi.llm.is_retryable check: dokimi/novelty/atoms.py:438 (except Exception in the batch loop), dokimi/novelty/measure.py:347 (a provider failure becomes an ERRORED answer for each probe/arm) and dokimi/novelty/batching.py:130 (the shared batch retry). Found by reading the paths, not by a run. With missing credentials each would, by the same reasoning, make every remaining call and record each as failed. Fix: stop at the first exception for which is_retryable is false, keep the partial result as a cap stop does, and still record per-item failures (refusals, unparseable replies).

Found while fixing #677. The fix's PR is #709.