[TASK] Phase 3: Configuration and Initial Deployment

Description

Configure the auto-remediation system and deploy to merge queue workflow:

• Set repository variables and secrets
• Configure opt-in for merge queue only (initial rollout)
• Deploy and test with real merge queue failures
• Monitor diagnostic accuracy

This is Phase 3 of the Auto-Remediation EPIC (#34656).

Acceptance Criteria

• ANTHROPIC_API_KEY secret configured
• Repository variables set: AUTO_REMEDIATION_ENABLED=true, AUTO_REMEDIATION_WORKFLOWS="-2 Merge Group Check", AUTO_CREATE_ISSUES=true
• SLACK_REPORT_CHANNEL configured
• Workflow deployed to main branch
• Test with actual merge queue failure
• Verify diagnostic completes within 10 minutes
• Verify issue created with correct template and labels
• Verify Slack notification sent with diagnosis
• Monitor for 1 week and collect metrics

Priority

High

Additional Context

Configuration Steps:

1. Add ANTHROPIC_API_KEY secret (Settings → Secrets → Actions)
2. Set repository variables via gh CLI or UI
3. Deploy workflow files to main
4. Test with triggered merge queue failure

Depends on: Phase 1 (#34657), Phase 2 (issue TBD)

Related: Parent EPIC #34656

Start with the workflow files from Phases 1 and 2, then review Settings → Secrets → Actions and the repository variables configured through the gh CLI or UI. Done means the merge-queue workflow is deployed to main, a real failure completes diagnosis within 10 minutes, and the issue, labels, Slack notification, and one-week metrics meet the listed criteria.