Prevent false agentic workflow failures when Copilot token is unset

[Copilot]

The parent [agentics] Failed runs issue is tracking workflow health noise caused by sub-issues from failed agentic runs. In this repo, the Weekly Content Update run failed when COPILOT_GITHUB_TOKEN was not configured, even though the failure was environmental rather than a workflow logic defect.

• Root-cause handling (Weekly Content Update)

  • Added a job-level guard to skip the agent job when COPILOT_GITHUB_TOKEN is missing.
  • This avoids generating failure issues for missing-secret scenarios and keeps failure tracking focused on actionable workflow defects.

• Scope

  • Single-file, surgical workflow change in:
    • .github/workflows/weekly-content-update.lock.yml
  • No behavior changes when the secret is present.

agent:
  needs: activation
  if: ${{ secrets.COPILOT_GITHUB_TOKEN != '' }}
  runs-on: ubuntu-latest