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/postgres/service.yaml

@@ -0,0 +1,17 @@
+# PostgreSQL Service
+apiVersion: v1
+kind: Service
+metadata:
+  name: postgres
+  namespace: roboco
+  labels:
+    app.kubernetes.io/name: postgres
+    app.kubernetes.io/component: database
+spec:
+  type: ClusterIP
+  ports:
+    - port: 5432
+      targetPort: 5432
+      name: postgres
+  selector:
+    app: postgres

deploy/base/postgres/statefulset.yaml

@@ -0,0 +1,84 @@
+# PostgreSQL StatefulSet with pgvector for RAG
+apiVersion: apps/v1
+kind: StatefulSet
+metadata:
+  name: postgres
+  namespace: roboco
+  labels:
+    app.kubernetes.io/name: postgres
+    app.kubernetes.io/component: database
+spec:
+  serviceName: postgres
+  replicas: 1
+  selector:
+    matchLabels:
+      app: postgres
+  template:
+    metadata:
+      labels:
+        app: postgres
+        app.kubernetes.io/name: postgres
+    spec:
+      containers:
+        - name: postgres
+          image: pgvector/pgvector:pg16
+          ports:
+            - containerPort: 5432
+              name: postgres
+          env:
+            - name: POSTGRES_USER
+              valueFrom:
+                secretKeyRef:
+                  name: roboco-secrets
+                  key: postgres-user
+            - name: POSTGRES_PASSWORD
+              valueFrom:
+                secretKeyRef:
+                  name: roboco-secrets
+                  key: postgres-password
+            - name: POSTGRES_DB
+              value: roboco
+            - name: PGDATA
+              value: /var/lib/postgresql/data/pgdata
+          volumeMounts:
+            - name: postgres-data
+              mountPath: /var/lib/postgresql/data
+          resources:
+            requests:
+              memory: "512Mi"
+              cpu: "250m"
+            limits:
+              memory: "2Gi"
+              cpu: "1000m"
+          livenessProbe:
+            exec:
+              command:
+                - pg_isready
+                - -U
+                - roboco
+                - -d
+                - roboco
+            initialDelaySeconds: 30
+            periodSeconds: 10
+            timeoutSeconds: 5
+            failureThreshold: 6
+          readinessProbe:
+            exec:
+              command:
+                - pg_isready
+                - -U
+                - roboco
+                - -d
+                - roboco
+            initialDelaySeconds: 5
+            periodSeconds: 5
+            timeoutSeconds: 3
+  volumeClaimTemplates:
+    - metadata:
+        name: postgres-data
+      spec:
+        accessModes: ["ReadWriteOnce"]
+        storageClassName: nfs-roboco
+        resources:
+          requests:
+            storage: 10Gi