Discover daemon and control-plane capabilities

{
  "capabilities": [
    {
      "id": "coven.control.actions",
      "label": "Coven control-plane action router",
      "adapter": "coven-daemon",
      "status": "available",
      "policy": "allow",
      "actions": [
        "coven.capabilities.refresh"
      ]
    },
    {
      "id": "desktop.automation",
      "label": "Desktop automation adapters",
      "adapter": "desktop-use",
      "status": "planned",
      "policy": "requiresApproval",
      "actions": []
    }
  ]
}

{
  "error": {
    "code": "internal_error",
    "message": "Unexpected internal daemon error.",
    "details": {}
  }
}