Import assistants from external provider

Example response

{
  "data": [
    {
      "tools": [
        {
          "webhook": {
            "url": "https://example.com/api/v1/function",
            "body_parameters": {
              "properties": {
                "age": {
                  "description": "The age of the customer.",
                  "type": "integer"
                },
                "location": {
                  "description": "The location of the customer.",
                  "type": "string"
                }
              },
              "required": [
                "age",
                "location"
              ],
              "type": "object"
            },
            "path_parameters": {
              "properties": {
                "id": {
                  "description": "The id of the customer.",
                  "type": "string"
                }
              },
              "required": [
                "id"
              ],
              "type": "object"
            },
            "query_parameters": {
              "properties": {
                "page": {
                  "description": "The page number.",
                  "type": "integer"
                }
              },
              "required": [
                "page"
              ],
              "type": "object"
            }
          }
        }
      ],
      "conversation_flow": {
        "edges": [
          {
            "condition": {
              "prompt": "The caller is asking about a bill or charge.",
              "type": "llm"
            },
            "id": "e_intake_to_billing",
            "start_node_id": "n_intake",
            "target": {
              "node_id": "n_billing",
              "type": "node"
            }
          },
          {
            "condition": {
              "prompt": "The caller has explicitly asked for a human.",
              "type": "llm"
            },
            "id": "e_intake_to_escalation_assistant",
            "start_node_id": "n_intake",
            "target": {
              "assistant_id": "assistant-human-handoff",
              "position": {
                "x": 600,
                "y": 80
              },
              "type": "assistant",
              "voice_mode": "distinct"
            }
          }
        ],
        "nodes": [
          {
            "type": "prompt",
            "id": "n_intake",
            "instructions": "Greet the caller and ask what they're calling about.",
            "name": "Intake",
            "position": {
              "x": 120,
              "y": 80
            },
            "shared_tool_ids": [
              "tool-faq-kb"
            ]
          },
          {
            "type": "prompt",
            "id": "n_billing",
            "instructions": "Focus on billing questions. Look up the caller's latest invoice with the billing tool before answering.",
            "instructions_mode": "append",
            "model": "moonshotai/Kimi-K2.6",
            "name": "Billing",
            "position": {
              "x": 420,
              "y": 80
            },
            "shared_tool_ids": [
              "tool-billing-lookup"
            ],
            "tools_mode": "append"
          }
        ],
        "start_node_id": "n_intake"
      }
    }
  ]
}