Update agent

PUT /api/agents/{agent_uuid}

{
  "agent": {
    "name": "Customer support agent",
    "description": "Routes urgent support questions.",
    "instructions": "Classify the request and recommend escalation.",
    "actions": [
      {
        "pipeline_uuid": "support_workflows",
        "block_uuid": "triage_ticket"
      }
    ]
  }
}