feat: 新增 voc_research Skill — 通过 curl 调用 VOC REST API

- 教 Agent 用 execute_shell_command + curl 完成 VOC 采集与查询
- 与黑手党提案 UDE 诊断阶段整合
- 零依赖：无需额外安装，利用已有 VOC 后端

agent/skill.json

@@ -1,5 +1,28 @@
 {
   "schema_version": "workspace-skill-manifest.v1",
-  "version": 1775480735028,
-  "skills": {}
+  "version": 1775495795224,
+  "skills": {
+    "voc_research": {
+      "enabled": true,
+      "channels": [
+        "all"
+      ],
+      "source": "customized",
+      "metadata": {
+        "name": "voc_research",
+        "description": "VOC 研究采集与分析",
+        "version_text": "1.0.0",
+        "source": "customized",
+        "protected": false,
+        "requirements": {
+          "require_bins": [],
+          "require_envs": []
+        }
+      },
+      "requirements": {
+        "require_bins": [],
+        "require_envs": []
+      }
+    }
+  }
 }