Adding convert endpoint

[kc13greiner]

Summary

Exposing UIAM API Key covert API to transform ES native API Keys into UIAM API Keys

Testing

Run Kibana & Elasticsearch in UIAM mode:

## Run Elasticsearch in UIAM mode
$ yarn es serverless --projectType observability --uiam

## Run Kibana in UIAM mode
$ yarn start --serverless=oblt --uiam

Create a native ES API Key (any will do!), copy the key value

Navigate to DevTools and call the convert endpoint that has been exposed through MockIdP:

POST kbn:/mock_idp/uiam/convert_api_keys
{
  "keys": [
    { "key": "RmhXb2Nwd0JYNFNUSmFER291MGc6YzZmNHEzMVBoai0wNXZSMkhaNUh6UQ==", "endpoint": "https://es01:9200" }
  ]
}

Result:

{
  "results": [
    {
      "status": "success",
      "id": "0b6Q5cQ3QRCz7afNV5UsIA",
      "key": "essu_dev_djE6MGI2UTVjUTNRUkN6N2FmTlY1VXNJQToyN256a21YZU05bjhWWklqWEZ4ZTF5OStpNzNBa3BUTGNlMW8yQ2VLclhJPQAAAAAJQBl0",
      "organization_id": "org1234567890",
      "description": "kurt test key",
      "internal": true,
      "role_assignments": {
        "project": {
          "observability": [
            {
              "role_id": "observability-application-only",
              "organization_id": "org1234567890",
              "all": true,
              "application_roles": [
                "admin"
              ]
            }
          ]
        }
      },
      "creation_date": "2026-02-18T21:33:59.201099712Z"
    }
  ]
}

To view error conditions:

In DevTools:

POST kbn:/mock_idp/uiam/convert_api_keys
{
  "keys": [
    { "key": "RmhXb2Nwd0JYNFNUSmFER291MGc6YzZmNHEzMVBoai0wNXZSMkhaNUh6UQ==", "endpoint": "https://es01:9200" },
    { "key": "RmhXb2Nwd0JYNFNUSmFER291MGc6YzZmNHEzMVBoai0wNXZSMkhaNUh6UQ==", "endpoint": "bad_endpoint" },
    { "key": "bad_key", "endpoint": "https://es01:9200" }
  ]
}

{
  "results": [
    {
      "status": "success",
      "id": "suowHKf4QUCW8uBpwW7U-A",
      "key": "essu_dev_djE6c3Vvd0hLZjRRVUNXOHVCcHdXN1UtQTp3NXdJbW91MHdvS2Q5L0xTZmxjQUhPVWY0YUJXc1MrM01JOGVZeVVZdTNvPQAAAADL/CVa",
      "organization_id": "org1234567890",
      "description": "kurt test key",
      "internal": true,
      "role_assignments": {
        "project": {
          "observability": [
            {
              "role_id": "observability-application-only",
              "organization_id": "org1234567890",
              "all": true,
              "application_roles": [
                "admin"
              ]
            }
          ]
        }
      },
      "creation_date": "2026-02-18T21:43:46.936473221Z"
    },
    {
      "status": "failed",
      "message": "Internal server error: java.lang.NullPointerException: Host name",
      "type": "GENERAL.UNKNOWN",
      "resource": "",
      "code": "0x1C6964"
    },
    {
      "status": "failed",
      "message": "Internal server error: API key is not valid for conversion. Elasticsearch returned 401 when attempting to authenticate API key",
      "type": "VALIDATION.API_KEY",
      "resource": "",
      "code": "0x10CE92"
    }
  ]
}