test: Smoke test refactored run-agent composite action

[cgwalters]

Smoke-tests the refactored agentic-merge-queue-monitor using the new composite action.

[bootc-bot]

🤖 CI Failure Analysis

Merge-queue CI run failed for commit 75fd998f — view run.

1. The specific failing jobs are:

   • test-integration (ubuntu-24.04, debug) at step "integration test"
   • test-integration (ubuntu-24.04, release) at step "integration test"
     The key error line is: Simulated integration failure (ci/fail-integration present).

2. This does NOT look like a flaky or transient failure. Both integration test jobs fail consistently due to the presence of the marker file ci/fail-integration, which deliberately triggers a simulated failure.

3. The most likely root cause is that the file ci/fail-integration was intentionally left in the repo or workspace, causing all integration tests to fail by design.

4. Concrete next action: Inspect and remove the ci/fail-integration file from the repository or CI workspace configuration, then re-run the CI to confirm integration tests pass.

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AI-generated by the agentic-merge-queue-monitor workflow using GitHub Models (gpt-4.1). Treat as a starting point, not ground truth.

[cgwalters]

Closing — composite action smoke test passed.