Verify one staging checkout

Open the staging environment. Keep STAGING_BASE_URL and STAGING_TEST_EMAIL as Environment Variables and store STAGING_TEST_PASSWORD as a Runtime Secret. Set network access to Allowlist only with staging.acme.test and the exact Cloud Agent artifact host. Start a Cloud Agent and ask it to use computer use for order TEST-482's sandbox checkout. Review the screenshot, short video and log reference on the agent page. Keep GitHub artifact posting off because the evidence shows the test account email, then review any pull request diff separately. Remove or rotate the temporary password. Use the Delete Agent API if the transcript and artifacts should not remain.