test(progress): a keyed failure logs its kind, not the error's text (red; review F3)

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

internal/progress/tracker_test.go

@@ -197,7 +197,7 @@ func TestTracker_FailRunningMarksTheRunningStepFailedAndLeavesTheRestPending(t *
 	require.Equal(t, domain.StepPending, stateOf(steps, "save"), "what never started stays pending: it shows where the job stopped")
 }
 
-func TestTracker_AKeyedFailMarksOneStepFailedLogsWhyAndTheJobGoesOn(t *testing.T) {
+func TestTracker_AKeyedFailMarksOneStepFailedLogsItsKindAndTheJobGoesOn(t *testing.T) {
 	tr, sink, _, buf := newTracker(t)
 	tr.Start()
 	tr.Begin("audio", 0)
@@ -209,7 +209,8 @@ func TestTracker_AKeyedFailMarksOneStepFailedLogsWhyAndTheJobGoesOn(t *testing.T
 	require.Equal(t, domain.StepFailed, stateOf(steps, "audio"))
 	require.Equal(t, domain.StepRunning, stateOf(steps, "decide"), "a soft failure must not stop the next step from running")
 	require.Contains(t, buf.String(), "level=WARN")
-	require.Contains(t, buf.String(), "gateway said no")
+	require.NotContains(t, buf.String(), "gateway said no", "an error's text can carry provider output or a path: the log gets its kind")
+	require.Contains(t, buf.String(), "kind=error")
 	require.Contains(t, buf.String(), "step=audio")
 }