Retry e2e after transient sandbox disconnect

The previous E2E run passed all reasoning protocol checks but failed one cloud sandbox call with RemoteDisconnected from the service side. Trigger a fresh run without changing behavior.

Constraint: GitHub integration cannot rerun failed jobs: Resource not accessible by integration.

Rejected: Change sandbox implementation or test expectation | The failure is outside the reasoning_content change and occurred after the same cloud test had already passed its async variant.

Confidence: medium

Scope-risk: narrow

Directive: Remove this empty retry commit before merge if maintainers prefer a cleaner history, or squash it with the e2e expectation commit.

Tested: Prior run 26796842299 showed tests/e2e/test_reasoning_protocol.py all passed before one sandbox service RemoteDisconnected failure.

Change-Id: Idd9a2618187c61b6bbfb360c6f8de2cfb719974a
Not-tested: Fresh GitHub E2E result pending.

Author: congxiao-wxx