Multi-cluster federation for global workflows

[lanycrost]

Summary

Enable Stories to span multiple Kubernetes clusters for global workflow orchestration.

Problem

Currently all workflow execution is confined to a single cluster. Cross-region or multi-cluster scenarios require external orchestration.

Proposed change

• Cross-cluster event transport via CloudEvents and Agentic Ingress
• Federated Story execution with region-aware step placement
• Depends on: CloudEvents adoption, Agentic Ingress Layer

References

• Roadmap: https://bubustack.io/docs/community/roadmap (Long-term vision)