test(perf): the Stage 4 dense contract requires no nudged overlay (#719)

The isometric-stage3-dense-v1 runner still demanded at least one bounded
#651 nudge. Since #713 every raised device tile and lock badge is lifted by
the one shared wall-top rise and carries data-hp-iso-nudged="false", so the
Full Performance profile failed its input contract before any timing.

The contract is inverted: a single nudged raised root now fails the sample,
matching the golden requireOneRise preflight. The performance README states
the current contract, and the #570 runner-contract unit pins the new failure
text.

Issue: #719
User-Visible: no
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_018qZfe7YS4rqEMKoVeS3GKd

test/performance-workflow.test.mjs

@@ -150,6 +150,7 @@ test('#570 current Stage 4 runner fails closed on the agreed observable DOM cont
     'opening surfaces',
     'entered Flat fallback',
     'structural build counter is absent',
+    'raised overlay nudged although #713 lifts every tile by one rise',
     'isoStructuralBuilds',
     'haUpdateDelta',
     'performed a structural rebuild for an HA-only state update',