Runs that go in circles end (M7.8)

Driver.run checks each turn with nisse_core.loop.circles and ends the run
as "circling" when the same calls get much the same back, one harness
correction is given again and again, or the model apologises, for
circle_repeats turns in a row (default 3). Near-identical calls (git add
a.py, b.py) and scattered apologies stay flags on the status page. A
fact in the transcript says why the run ended.

nisse-dev calls in a helper as for a stuck run, then asks the operator;
nisse-review counts a failed run and posts none of its drafts. Tuning:
tuning.driver / tuning.review circle_repeats (0 off) and circle_similar.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01J5Utyfzw7gF7UhjRDEtjTk

nisse-dev/src/nisse_dev/loop/agent.py

@@ -2378,11 +2378,12 @@ class LoopAgent:
 
     def _help_when_stuck(self, item: WorkItem, loop: Loop, outcome: RunOutcome) -> bool:
         """L9's observable triggers: the driver stuck (commands failing in a
-        row) or out of turns mid-milestone. A helper is called in, once per
-        milestone; True when it finished and the driver goes on."""
+        row), going in circles (L2), or out of turns mid-milestone. A helper
+        is called in, once per milestone; True when it finished and the
+        driver goes on."""
         if (
             self._helpers is None
-            or outcome.kind not in ("stuck", "capped")
+            or outcome.kind not in ("stuck", "circling", "capped")
             or not loop.branch
             or loop.helped_at == loop.milestone
         ):