feat(infra): add all Kubernetes manifests

- namespace, temporal server, workspaces PVC
- API server deployment, service, serviceaccount, RBAC
- Dev overlay

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

apps/api/infra/base/rbac.yaml

@@ -0,0 +1,29 @@
+apiVersion: rbac.authorization.k8s.io/v1
+kind: Role
+metadata:
+  name: shannon-api
+  namespace: shannon
+rules:
+  - apiGroups: ["batch"]
+    resources: ["jobs"]
+    verbs: ["create", "get", "list", "delete", "watch"]
+  - apiGroups: [""]
+    resources: ["pods"]
+    verbs: ["get", "list", "watch"]
+  - apiGroups: [""]
+    resources: ["pods/log"]
+    verbs: ["get"]
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: RoleBinding
+metadata:
+  name: shannon-api
+  namespace: shannon
+subjects:
+  - kind: ServiceAccount
+    name: shannon-api
+    namespace: shannon
+roleRef:
+  kind: Role
+  name: shannon-api
+  apiGroup: rbac.authorization.k8s.io