feat: add Helmfile-managed k8s charts for tasks 10-13

Local charts: kafka-cluster (Strimzi Kafka+KafkaNodePool CRs, 3-replica KRaft
topology, 5Gi memory cap, Longhorn storage, pod anti-affinity), queue-crd
(Queue CRD + queue-operator Deployment/RBAC), management-service
(Deployment/Service/ConfigMap/HPA/Ingress, REST exposed externally via
cert-manager-issued TLS, raw gRPC kept cluster-internal per design.md §7a).

helmfile.yaml.gotmpl + releases.d/*.gotmpl wire strimzi-operator ->
kafka-cluster -> redis -> {queue-crd, management-service} via `needs:`.
Directory is releases.d, not helmfile.d as originally sketched in design.md
section 7b: Helmfile v1 treats a literal "helmfile.d" directory as a special
auto-discovery mode that conflicts with an explicit top-level helmfile.yaml.
Files use .gotmpl (required by Helmfile v1 for {{ }}-templated files) and
each declares its own environments: block, since nested helmfiles don't
inherit the parent's resolved values in this version.

Namespace is sqs throughout. environments/homelab.yaml carries no secrets.
Validated locally via helm lint/helm template (all 3 charts) and
`helmfile -e homelab build` (dependency ordering + value substitution) — no
cluster contact made. Live apply is a separate, explicitly-confirmed step.

k8s/charts/queue-crd/templates/rbac.yaml

@@ -0,0 +1,39 @@
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: queue-operator
+  namespace: {{ .Values.namespace }}
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRole
+metadata:
+  name: queue-operator
+rules:
+  - apiGroups: ["kmsvc.io"]
+    resources: ["queues"]
+    verbs: ["get", "list", "watch", "update", "patch"]
+  - apiGroups: ["kmsvc.io"]
+    resources: ["queues/status"]
+    verbs: ["get", "update", "patch"]
+  - apiGroups: ["kmsvc.io"]
+    resources: ["queues/finalizers"]
+    verbs: ["update"]
+  - apiGroups: ["coordination.k8s.io"]
+    resources: ["leases"]
+    verbs: ["get", "list", "watch", "create", "update", "patch", "delete"]
+  - apiGroups: [""]
+    resources: ["events"]
+    verbs: ["create", "patch"]
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRoleBinding
+metadata:
+  name: queue-operator
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: ClusterRole
+  name: queue-operator
+subjects:
+  - kind: ServiceAccount
+    name: queue-operator
+    namespace: {{ .Values.namespace }}