A repository uses three Copilot custom agents in a multi-agent workflow: triage-agent, workflow-fix-agent, and release-note-agent. The workflow-fix-agent is being retired because its responsibilities have moved to a newer ci-remediation-agent. The team must stop new use of the retired agent, preserve historical audit evidence, and avoid breaking issue templates and workflow documentation that still reference the old agent name. Which four actions should you perform in order? 1. Delete all old draft pull requests created by the retired agent 2. Add a deprecation notice to the retired agent profile 3. Update routing docs and issue templates to the replacement agent 4. Disable manual and model invocation for the retired agent 5. Remove workflow logs and artifacts to reduce confusion 6. Verify existing PRs, issues, and artifacts remain traceable