Delivered: Production-grade security, reliability, and CI/CD practices for the K8s deployment.

Key accomplishments:
- Fixed and hardened all 3 CI workflows (permissions, caching, path filters)
- Security contexts, dedicated ServiceAccounts, and SealedSecrets on all K8s workloads
- RabbitMQ StatefulSet, startup probes, MassTransit outbox on all DbContexts
- ArgoCD sync waves, dedicated AppProject, sealed secrets in Git
- Bootstrap script safety (pre-flight, context guard, trap handler)
- 29/29 requirements satisfied across 6 phases

See .planning/MILESTONES.md for full details.