Add new fields to WorkflowRun

[tohjustin]

The following new fields can be found in the WorkflowRun object when querying the /repos/{owner}/{repo}/actions/runs & /repos/{owner}/{repo}/actions/runs/{run_id} endpoints:

• previous_attempt_url
• run_attempt
• run_started_at

They aren't shown in the example responses found in their API docs yet but you can see them from the API requests via cURL (from workflow runs back in 2020):

$ curl "https://api.github.com/repos/actions/runner/actions/runs/111773609"
{
  "id": 111773609,
  "name": "Code Scanning - Action",
  "node_id": "MDExOldvcmtmbG93UnVuMTExNzczNjA5",
  "head_branch": "master",
  "head_sha": "11435857e4cd9795fa5ee68c20b674e5f96052ab",
  "run_number": 34,
  "event": "push",
  "status": "completed",
  "conclusion": "success",
  "workflow_id": 1221321,
  "check_suite_id": 705507172,
  "check_suite_node_id": "MDEwOkNoZWNrU3VpdGU3MDU1MDcxNzI=",
  "url": "https://api.github.com/repos/actions/runner/actions/runs/111773609",
  "html_url": "https://github.com/actions/runner/actions/runs/111773609",
  "pull_requests": [
    {
      "url": "https://api.github.com/repos/ToSa27/runner/pulls/1",
      "id": 402596127,
      "number": 1,
      "head": {
        "ref": "master",
        "sha": "dcda342eccd152fe69521d59de016ef09b70400c",
        "repo": {
          "id": 184286875,
          "url": "https://api.github.com/repos/actions/runner",
          "name": "runner"
        }
      },
      "base": {
        "ref": "master",
        "sha": "94930014a876a51d7d50ea7afcfce97e09203b9b",
        "repo": {
          "id": 246471129,
          "url": "https://api.github.com/repos/ToSa27/runner",
          "name": "runner"
        }
      }
    }
  ],
  "created_at": "2020-05-21T19:49:21Z",
  "updated_at": "2020-05-21T19:59:31Z",
  "run_attempt": 1,
  "run_started_at": "2020-05-21T19:49:21Z",
  "jobs_url": "https://api.github.com/repos/actions/runner/actions/runs/111773609/jobs",
  "logs_url": "https://api.github.com/repos/actions/runner/actions/runs/111773609/logs",
  "check_suite_url": "https://api.github.com/repos/actions/runner/check-suites/705507172",
  "artifacts_url": "https://api.github.com/repos/actions/runner/actions/runs/111773609/artifacts",
  "cancel_url": "https://api.github.com/repos/actions/runner/actions/runs/111773609/cancel",
  "rerun_url": "https://api.github.com/repos/actions/runner/actions/runs/111773609/rerun",
  "previous_attempt_url": null,
  "workflow_url": "https://api.github.com/repos/actions/runner/actions/workflows/1221321",
  "head_commit": { ... },
  "repository": { ... },
  "head_repository": { ... }
}

And also the OpenAPI spec for api.github.com:

{
  "openapi": "3.0.3",
  "components": {
    "schemas": {
      "workflow-run": {
        "title": "Workflow Run",
        "description": "An invocation of a workflow",
        "type": "object",
        "properties": {
          "run_attempt": {
            "type": "integer",
            "description": "Attempt number of the run, 1 for first attempt and higher if the workflow was re-run.",
            "example": 1
          },
          "run_started_at": {
            "type": "string",
            "format": "date-time",
            "description": "The start time of the latest run. Resets on re-run."
          },
          "previous_attempt_url": {
            "nullable": true,
            "description": "The URL to the previous attempted run of this workflow, if one exists.",
            "type": "string",
            "example": "https://api.github.com/repos/github/hello-world/actions/runs/5/attempts/3"
          },
          ...
        },
        "required": [
          "id",
          "node_id",
          "head_branch",
          "run_number",
          "event",
          "status",
          "conclusion",
          "head_sha",
          "workflow_id",
          "url",
          "html_url",
          "created_at",
          "updated_at",
          "head_commit",
          "head_repository",
          "repository",
          "jobs_url",
          "logs_url",
          "check_suite_url",
          "cancel_url",
          "rerun_url",
          "artifacts_url",
          "workflow_url",
          "pull_requests"
        ]
      }
    }
  }
}