fix: Alloy block syntax, dpkg lock wait, hitl local bind, ai-reader nodes RBAC, harness image f30af2a

- Alloy 설정 3종: rule 블록을 한 줄 쉼표 나열에서 줄바꿈 속성으로 수정(실측: k8s DaemonSet
  CrashLoopBackOff, db-replica alloy.service "expected TERMINATOR, got ,"). alloy fmt로 3종 파싱 확인.
- vm/postgres-common/alloy.sh: apt에 DPkg::Lock::Timeout=600(db-primary에서 unattended-upgrades 잠금으로 100 종료).
- vm/ai-env/compose.yaml: hitl 8081을 127.0.0.1에만 바인딩(agent는 compose 네트워크로 접근).
- workloads/rbac/ai-reader.yaml: nodes get/list/watch ClusterRole 추가(agent get_k8s(nodes) selfcheck 거부 해소).
- vm/harness/image.tag: f30af2a(POST /proposals/{token}/approve·reject 포함 러너).

vm/postgres-common/alloy.sh

@@ -11,8 +11,9 @@ if ! command -v alloy >/dev/null; then
   wget -qO /etc/apt/keyrings/grafana.asc https://apt.grafana.com/gpg-full.key
   chmod 644 /etc/apt/keyrings/grafana.asc
   echo "deb [signed-by=/etc/apt/keyrings/grafana.asc] https://apt.grafana.com stable main" > /etc/apt/sources.list.d/grafana.list
-  apt-get update -qq
-  apt-get install -y -qq alloy >/dev/null
+  # wait for unattended-upgrades instead of failing on the dpkg lock (db-primary 2026-10-08: "Could not get lock /var/lib/dpkg/lock-frontend")
+  apt-get -o DPkg::Lock::Timeout=600 update -qq
+  apt-get -o DPkg::Lock::Timeout=600 install -y -qq alloy >/dev/null
 fi
 usermod -aG adm alloy   # /var/log/postgresql/*.log is postgres:adm 0640
 install -d -m 755 /etc/alloy

vm/postgres-common/config.alloy

@@ -15,7 +15,10 @@ prometheus.scrape "db" {
 
 prometheus.relabel "instance" {
   forward_to = [prometheus.remote_write.mimir.receiver]
-  rule { target_label = "instance", replacement = sys.env("INSTANCE") }
+  rule {
+    target_label = "instance"
+    replacement = sys.env("INSTANCE")
+  }
 }
 
 prometheus.remote_write "mimir" {