Fold MessageCursorAdvanced into signal-with-start history fixture

testSignalWithStartStartsNewRunAndOrdersSignalBeforeFirstWorkflowStep
expected SignalApplied immediately after SignalWaitOpened, but the
message-stream cursor work emits MessageCursorAdvanced between the
late-bound wait open and the apply for the same signal command.

Refs #399

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: durable-workflow-ops

tests/Feature/V2/V2WorkflowTest.php

@@ -4568,6 +4568,7 @@ public function testSignalWithStartStartsNewRunAndOrdersSignalBeforeFirstWorkflo
             'WorkflowStarted',
             'SignalReceived',
             'SignalWaitOpened',
+            'MessageCursorAdvanced',
             'SignalApplied',
             'ActivityScheduled',
             'ActivityStarted',