the job job_steps info is not match real situation

[asiroliu]

Description

Steps to reproduce the issue

1. create a job
2. get API /v2/jobs
3. return

{
  "jobs": [
    {
      "job_id": "test-migration",
      "job_status": "running",
      "topic": "",
      "job_create_time": "2021-08-04T14:39:49+08:00",
      "src_addr_list": [
        "172.100.9.1"
      ],
      "dst_addr_list": [
        "172.100.9.2"
      ],
      "job_steps": [
        {
          "step_name": "job_stage_full",
          "step_status": "start",
          "step_schedule": 0,
          "job_create_time": "2021-08-04T14:39:49+08:00"
        }
      ]
    }
  ],
  "message": "ok"
}

4. send incr data, but the job_steps info not updata

Output of ./dtle version:**

9.9.9.9-master-69a72b4

Additional information

(e.g. issue happens only occasionally)

Additional details (log, config, job config etc):