F/277 api getting job tree

[ahnwarez]

Issue: #277
This PR is a small PR that supports BullMQ Flow and it focuses on the backened api.

The endpoint /api/queues/:queuename/:jobId now includes a new property called jobTree, and this property contains all children jobs to the related job. Here is what the response looks like when the endpoint is called:

 {
    "job": {
        "id": "46a7c114-3390-4d23-9ca6-aa70a8dddba8",
        "timestamp": 1735957798661,
        "processedOn": 1735957832167,
        "finishedOn": 1735957832168,
        "progress": 0,
        // ...
     },
    "status": "completed",
    "jobTree": [
        {
            "name": "B",
            "id": "6f6f5fe7-8f65-48e7-9bb5-7386bd9b8fa2",
            "jobTree": [
                {
                    "name": "C",
                    "id": "c09cf2b7-f9c9-47ab-9777-699a9c9d8d38",
                    "jobTree": [
                        {
                            "name": "D",
                            "id": "69d4d27c-321d-462c-a484-c59db54183fa",
                            "jobTree": [
                                {
                                    "name": "E",
                                    "id": "62d1e7d8-6b42-485f-ae85-db27b0da9353"
                                }
                            ]
                        }
                    ]
                }
            ]
        }
    ]
}

The FE should be able to consume jobTree (NOT in this PR) and display something like this:

A future PR will handle the FE once this is merged.

Please let me know if I missed something. Any feedback is welcomed.