feat: add Kubernetes manifests and A2A protocol support

Phase 2 - A2A Protocol:
- Add A2A models (AgentCard, Task, Message)
- Add A2A service layer
- Add A2A routes with SSE streaming
- Add agent discovery endpoints

Phase 3 - Kubernetes:
- Add deploy/ directory with Kustomize structure
- PostgreSQL StatefulSet with pgvector
- Redis Deployment with persistence
- API and Orchestrator Deployments
- RBAC for orchestrator to manage Jobs
- ArgoCD Application manifest
- Development and production overlays
- K8s Jobs API support in orchestrator

docs/standards/workflow/agent_roles.md

@@ -99,7 +99,7 @@ class AgentRole(str, Enum):
 |------|-----|------------|-----|------------|
 | Backend | be-pm | be-dev-1, be-dev-2 | be-qa | be-doc |
 | Frontend | fe-pm | fe-dev-1, fe-dev-2 | fe-qa | fe-doc |
-| UX/UI | ux-pm | ux-dev | ux-qa | ux-doc |
+| UX/UI | ux-pm | ux-dev-1, ux-dev-2 | ux-qa | ux-doc |
 
 ---