[Schema Inaccuracy] `issue.state_reason` missing enum variant: `duplicate`

[sterliakov]

Schema Inaccuracy

(this issue was reposted from https://github.com/orgs/community/discussions/150535, cc yanyongyu/githubkit#188)

Current definition:

      "state_reason": {
        "description": "The reason for the current state",
        "type": [
          "string",
          "null"
        ],
        "enum": [
          "completed",
          "reopened",
          "not_planned",
          null
        ],
        "examples": [
          "not_planned"
        ]
      },

Expected

duplicate listed among variants. Here's an issue with that state_reason (https://api.github.com/repos/python/mypy/issues/18584):

    {
        "active_lock_reason": null,
        "assignee": null,
        "assignees": [],
        "author_association": "CONTRIBUTOR",
        "body": "...",                                                                                                     
        "closed_at": "2025-02-02T16:24:49Z",
        "closed_by": {...},
        "comments": 1,
        "comments_url": "https://api.github.com/repos/python/mypy/issues/18584/comments",
        "created_at": "2025-02-01T23:28:55Z",
        "events_url": "https://api.github.com/repos/python/mypy/issues/18584/events",
        "html_url": "https://github.com/python/mypy/issues/18584",
        "id": 2825499430,
        "labels": [...],
        "labels_url": "https://api.github.com/repos/python/mypy/issues/18584/labels{/name}",
        "locked": false,
        "milestone": null,
        "node_id": "I_kwDOAGuhRc6oabMm",
        "number": 18584,
        "performed_via_github_app": null,
        "reactions": {...},
        "repository_url": "https://api.github.com/repos/python/mypy",
        "state": "closed",
        "state_reason": "duplicate",
        "sub_issues_summary": {
            "completed": 0,
            "percent_completed": 0,
            "total": 0
        },
        "timeline_url": "https://api.github.com/repos/python/mypy/issues/18584/timeline",
        "title": "Overloaded signature with `LiteralString` is seen as \"broader or same\" as `str`",
        "updated_at": "2025-02-02T16:24:50Z",
        "url": "https://api.github.com/repos/python/mypy/issues/18584",
        "user": {...}
    }

Reproduction Steps

$ curl -fs https://api.github.com/repos/python/mypy/issues/18584 | jq -r '.state_reason'
duplicate