fix(4909c): the tool-arm suppression tests read the arm's own row, not the slot's

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

tests/test_rule_usage_wiring.py

@@ -985,14 +985,21 @@ async def test_a_genuine_ranker_decline_reports_zero_suppression():
     assert row.kwargs["suppressed"] is not None
 
 
+def _tool_row(log):
+    """The tool arm's own call row; the preference slot logs beside it."""
+    rows = [c for c in log.call_args_list if c.kwargs.get("source") == "pre_tool_rule"]
+    assert len(rows) == 1, rows
+    return rows[0].kwargs
+
+
 @pytest.mark.asyncio
 async def test_the_tool_arm_reports_suppression_too():
     log, rec = MagicMock(), MagicMock()
     hits = [(0.75, fake_rule(id=161, title="Reach the forge through its MCP tools"))]
     await _run_tool_arm(hits, rec, retrieval_log=log, exclude_rule_ids=[161])
 
-    assert log.call_args.kwargs["results"] == []
-    assert log.call_args.kwargs["suppressed"] == 1
+    assert _tool_row(log)["results"] == []
+    assert _tool_row(log)["suppressed"] == 1
 
 
 @pytest.mark.asyncio
@@ -1005,8 +1012,8 @@ async def test_a_shown_hit_is_not_counted_as_suppressed():
     out = await _run_tool_arm(hits, rec, retrieval_log=log, exclude_rule_ids=[12])
 
     assert out["rule_ids"] == [161]
-    assert log.call_args.kwargs["suppressed"] == 1
-    assert len(log.call_args.kwargs["results"]) == 1
+    assert _tool_row(log)["suppressed"] == 1
+    assert len(_tool_row(log)["results"]) == 1
 
 
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