Working with mutliple nested notebooks

Hi Jessy_D, 

In addition to what ibarrau mentioned, you can also use the Scheduler API. Here's my code snippet to do that: 
self.client is a FabricRestClient: 

 def start_job_instance(
        self,
        ws_id: str,
        item_id: str,
        job_type: str,
        parameters: Optional[Dict[str, Any]] = None
    ) -> str:
        """
        Start a Fabric job instance and return the job instance ID.

        Args:
            ws_id: Workspace GUID
            item_id: Item GUID (notebook or pipeline)
            job_type: "RunNotebook", "Notebook", or "Pipeline"
            parameters: Optional dict of parameter name -> value

        Returns:
            Job instance ID (GUID)

        Raises:
            RuntimeError: If job start fails
        """
        url = f"v1/workspaces/{ws_id}/items/{item_id}/jobs/instances?jobType={job_type}"

        # Build request body
        body = {}
        if parameters:
            body = {
                "executionData": {
                    "parameters": {
                        k: {"value": str(v), "type": "string"}
                        for k, v in parameters.items()
                    }
                }
            }

        log_debug(f"POST {url} params={list((parameters or {}).keys())}")
        resp = self.client.post(url, json=body)
        log_debug(f"POST response: {resp.status_code} Location={resp.headers.get('Location')}")

        if resp.status_code != 202:
            try:
                details = resp.json()
            except Exception:
                details = resp.text
            raise RuntimeError(
                f"Start job failed ({resp.status_code}) jobType={job_type}: {details}"
            )

        # Extract job instance ID from Location header
        loc = resp.headers.get("Location") or ""
        if "/jobs/instances/" not in loc:
            raise RuntimeError(
                f"202 Accepted but missing job instance Location (jobType={job_type})"
            )

        return loc.rsplit("/jobs/instances/", 1)[1]

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