Inspection batch observers bug

When uploading inspection batch and attaching observers to Inspection - the observers do not get attached. There is a bug which connects observers to transect in InspectionBatchAddMutation, where it should be connected to Inspection.

Example request:

{
  "query": "mutation batchAddInspection($input: batchAddInspectionInput!) {\n  batchAddInspection(input: $input) {\n    inspection {\n      _id\n    }\n  }\n}\n",
  "variables": {
    "input": {
      "inspectionBatch": {
        "id": "6TVXgTWWUBtIZYdq2OupW",
        "transectId": "/tagfalter-monitoring-api/index.php/transects/1",
        "observerIds": [
          "/tagfalter-monitoring-api/index.php/users/28"
        ],
        "dateTimeFrom": "2022-02-07T15:42:48.113Z",
        "dateTimeTo": "2022-02-07T15:42:57.485Z",
        "windBegin": null,
        "windEnd": null,
        "tempBegin": null,
        "tempEnd": null,
        "cloudinessBegin": null,
        "cloudinessEnd": null,
        "comment": null,
        "sectionEvents": [
          {
            "comment": null,
            "imageRefIds": null,
            "observations": null,
            "sectionId": "/tagfalter-monitoring-api/index.php/sections/2"
          },
          {
            "comment": null,
            "imageRefIds": null,
            "observations": null,
            "sectionId": "/tagfalter-monitoring-api/index.php/sections/4"
          },
          {
            "comment": null,
            "imageRefIds": null,
            "observations": null,
            "sectionId": "/tagfalter-monitoring-api/index.php/sections/5"
          }
        ]
      }
    }
  }
}