Fix test failures by adding workflow markers to test data

[Copilot]

Tests in close_expired_discussions.test.cjs and close_expired_pull_requests.test.cjs failed because the implementation now checks for XML comment workflow markers (gh-aw-workflow-id: or gh-aw-agentic-workflow:), but test data still used legacy text markers ("> AI generated by Test Workflow").

Changes

• Added <!-- gh-aw-workflow-id: test-workflow --> to 6 test discussions in close_expired_discussions.test.cjs
• Added <!-- gh-aw-workflow-id: test-workflow --> to 5 test pull requests in close_expired_pull_requests.test.cjs

The XML markers align test data with the current implementation's entity detection logic in expired_entity_search_helpers.cjs:

const hasWorkflowId = entity.body && entity.body.includes("gh-aw-workflow-id:");
const hasAgenticWorkflow = entity.body && entity.body.includes("gh-aw-agentic-workflow:");
const isAgenticWorkflow = hasWorkflowId || hasAgenticWorkflow;

Original prompt

Fix the failing GitHub Actions workflow js
Analyze the workflow logs, identify the root cause of the failure, and implement a fix.
Job ID: 62234063114
Job URL: https://github.com/githubnext/gh-aw/actions/runs/21597526255/job/62234063114

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