Some jobs have a "finished_at" date, but are still started or waiting


```
db.jobsBlue.count({"finished_at": {"$exists": true}, "status": {"$nin": ["success", "error", "cancelled"]}})
24
```

For example:

```
{ _id: ObjectId("649f417b849c36335817cfa7"),
  type: 'dataset-size',
  dataset: 'knowrohit07/know_cot',
  revision: 'f89e138e31115fd5b144aa0c52888316e710f752',
  unicity_id: 'dataset-size,knowrohit07/know_cot',
  namespace: 'knowrohit07',
  priority: 'normal',
  status: 'started',
  created_at: 2023-06-30T20:56:27.051Z,
  started_at: 2023-06-30T20:56:27.432Z,
  finished_at: 2023-06-30T20:56:27.499Z }
```

And the cache entry:

```
{
  "_id": { "$oid": "649f4175bd1b024a84d4b8c7" },
  "config": null,
  "dataset": "knowrohit07/know_cot",
  "kind": "dataset-size",
  "split": null,
  "content": {
    "size": {
      "dataset": {
        "dataset": "knowrohit07/know_cot",
        "num_bytes_original_files": 37076410,
        "num_bytes_parquet_files": 13932763,
        "num_bytes_memory": 31107926,
        "num_rows": 74771
      },
      "configs": [
        {
          "dataset": "knowrohit07/know_cot",
          "config": "knowrohit07--know_cot",
          "num_bytes_original_files": 37076410,
          "num_bytes_parquet_files": 13932763,
          "num_bytes_memory": 31107926,
          "num_rows": 74771,
          "num_columns": 3
        }
      ],
      "splits": [
        {
          "dataset": "knowrohit07/know_cot",
          "config": "knowrohit07--know_cot",
          "split": "train",
          "num_bytes_parquet_files": 13932763,
          "num_bytes_memory": 31107926,
          "num_rows": 74771,
          "num_columns": 3
        }
      ]
    },
    "pending": [],
    "failed": []
  },
  "dataset_git_revision": "f89e138e31115fd5b144aa0c52888316e710f752",
  "details": null,
  "error_code": null,
  "http_status": 200,
  "job_runner_version": 2,
  "progress": 1,
  "updated_at": { "$date": "2023-06-30T20:56:27.488Z" }
}
```
Some jobs have a "finished_at" date, but are still started or waiting: 

```
db.jobsBlue.count({"finished_at": {"$exists": true}, "status": {"$nin": ["success", "error", "cancelled"]}})
24
```

For example:

```
{ _id: ObjectId("649f417b849c36335817cfa7"),
  type: 'dataset-size',
  dataset: 'knowrohit07/know_cot',
  revision: 'f89e138e31115fd5b144aa0c52888316e710f752',
  unicity_id: 'dataset-size,knowrohit07/know_cot',
  namespace: 'knowrohit07',
  priority: 'normal',
  status: 'started',
  created_at: 2023-06-30T20:56:27.051Z,
  started_at: 2023-06-30T20:56:27.432Z,
  finished_at: 2023-06-30T20:56:27.499Z }
```

And the cache entry:

```
{
  "_id": { "$oid": "649f4175bd1b024a84d4b8c7" },
  "config": null,
  "dataset": "knowrohit07/know_cot",
  "kind": "dataset-size",
  "split": null,
  "content": {
    "size": {
      "dataset": {
        "dataset": "knowrohit07/know_cot",
        "num_bytes_original_files": 37076410,
        "num_bytes_parquet_files": 13932763,
        "num_bytes_memory": 31107926,
        "num_rows": 74771
      },
      "configs": [
        {
          "dataset": "knowrohit07/know_cot",
          "config": "knowrohit07--know_cot",
          "num_bytes_original_files": 37076410,
          "num_bytes_parquet_files": 13932763,
          "num_bytes_memory": 31107926,
          "num_rows": 74771,
          "num_columns": 3
        }
      ],
      "splits": [
        {
          "dataset": "knowrohit07/know_cot",
          "config": "knowrohit07--know_cot",
          "split": "train",
          "num_bytes_parquet_files": 13932763,
          "num_bytes_memory": 31107926,
          "num_rows": 74771,
          "num_columns": 3
        }
      ]
    },
    "pending": [],
    "failed": []
  },
  "dataset_git_revision": "f89e138e31115fd5b144aa0c52888316e710f752",
  "details": null,
  "error_code": null,
  "http_status": 200,
  "job_runner_version": 2,
  "progress": 1,
  "updated_at": { "$date": "2023-06-30T20:56:27.488Z" }
}
```