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

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

deploy/base/redis/pvc.yaml

@@ -0,0 +1,16 @@
+# Redis Persistent Volume Claim
+apiVersion: v1
+kind: PersistentVolumeClaim
+metadata:
+  name: redis-data
+  namespace: roboco
+  labels:
+    app.kubernetes.io/name: redis
+    app.kubernetes.io/component: cache
+spec:
+  accessModes:
+    - ReadWriteOnce
+  storageClassName: nfs-roboco
+  resources:
+    requests:
+      storage: 1Gi