[sprint-11-06-2025] Implement sequential handoff pattern

[alirezarezvani]

Description

Enable multi-agent workflows with sequential handoffs.

Tasks

• Create orchestrator/coordination-patterns.yaml
• Implement demand-gen → content-creator workflow
• Create handoff templates
• Test campaign planning workflow
• Validate handoff completeness

Acceptance Criteria

• coordination-patterns.yaml created
• Sequential handoff working
• Campaign workflow end-to-end tested
• Handoff templates functional

Sprint: sprint-11-06-2025

Day: 2

[alirezarezvani]

Closing stale sprint planning ticket from November 2025 sprint. These internal sprint tasks are being managed elsewhere.