QN: leaderSetEvents lack leader info

[traumschule]

Triage why leaderSetEvents do no longer contain worker info. They did until at least 2024-10:

query {
  leaderSetEvents(orderBy: createdAt_DESC) {
    worker {
      membershipId
    }
    groupId
    createdAt
    inBlock
  }
}

"data": {
    "leaderSetEvents": [
      {
        "worker": null,
        "groupId": "contentWorkingGroup",
        "createdAt": "2025-10-27T08:32:12.000Z",
        "inBlock": 15102873
      },
      {
        "worker": null,
        "groupId": "operationsWorkingGroupAlpha",
        "createdAt": "2025-10-17T11:13:54.000Z",
        "inBlock": 14960586
      },
      {
        "worker": null,
        "groupId": "operationsWorkingGroupBeta",
        "createdAt": "2025-10-06T18:55:24.001Z",
        "inBlock": 14807011
      },
      {
        "worker": null,
        "groupId": "appWorkingGroup",
        "createdAt": "2025-09-29T09:54:00.000Z",
        "inBlock": 14701273
      },
      {
        "worker": null,
        "groupId": "operationsWorkingGroupGamma",
        "createdAt": "2025-02-12T08:48:36.000Z",
        "inBlock": 11422502
      },
      {
        "worker": {
          "membershipId": "515"
        },
        "groupId": "operationsWorkingGroupAlpha",
        "createdAt": "2024-10-07T23:03:48.000Z",
        "inBlock": 9591973
      },
      {
        "worker": {
          "membershipId": "515"
        },
        "groupId": "storageWorkingGroup",
        "createdAt": "2024-09-22T20:05:30.000Z",
        "inBlock": 9374586
      },
      {
        "worker": {
          "membershipId": "515"
        },
        "groupId": "distributionWorkingGroup",
        "createdAt": "2024-09-17T20:31:12.001Z",
        "inBlock": 9302981
      },
      {
        "worker": {
          "membershipId": "67206"
        },
        "groupId": "contentWorkingGroup",
        "createdAt": "2024-07-10T20:39:12.000Z",
        "inBlock": 8312388
      },
      {
        "worker": {
          "membershipId": "4129"
        },
        "groupId": "appWorkingGroup",
        "createdAt": "2024-06-25T15:23:24.000Z",
        "inBlock": 8094114
      },

Also as example the event executed in block 9591973 contains the wrong member id. It followed execution of proposal 1019 which elected lezek (member 336). Was it left blank intentionally?

      {
        "worker": {
          "membershipId": "515"
        },
        "groupId": "operationsWorkingGroupAlpha",
        "createdAt": "2024-10-07T23:03:48.000Z",
        "inBlock": 9591973
      },

Related code:

joystream/tests/network-tests/src/graphql/queries/workingGroupsEvents.graphql

Line 59 in b956002

worker {