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/legacy-api/config.alloy

@@ -17,9 +17,19 @@ discovery.docker "local" {
 
 discovery.relabel "containers" {
   targets = discovery.docker.local.targets
-  rule { source_labels = ["__meta_docker_container_name"], regex = "/(.*)", target_label = "container" }
-  rule { target_label = "job", replacement = "legacy-api" }
-  rule { target_label = "instance", replacement = sys.env("INSTANCE") }
+  rule {
+    source_labels = ["__meta_docker_container_name"]
+    regex = "/(.*)"
+    target_label = "container"
+  }
+  rule {
+    target_label = "job"
+    replacement = "legacy-api"
+  }
+  rule {
+    target_label = "instance"
+    replacement = sys.env("INSTANCE")
+  }
 }
 
 loki.source.docker "containers" {