Get CoverBot coverage gains

curl --request GET \
  --url https://use-tusk.uc.r.appspot.com/api/v1/analytics/coverbot-coverage-gains \
  --header 'x-api-key: <api-key>'

{
  "data": [
    {
      "clientId": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "repoId": 123,
      "repoName": "<string>",
      "scheduledTestRunId": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "prNumber": 123,
      "prTitle": "<string>",
      "prStatus": "<string>",
      "prCreatedAt": "<string>",
      "createdAt": "<string>",
      "updatedAt": "<string>",
      "runAverageLineCoverageGain": 123,
      "runAverageBranchCoverageGain": 123,
      "requestedPrReviewers": [
        "<string>"
      ],
      "filePath": "<string>",
      "lineCoverageBefore": 123,
      "lineCoverageAfter": 123,
      "lineCoverageGain": 123,
      "branchCoverageBefore": 123,
      "branchCoverageAfter": 123,
      "branchCoverageGain": 123,
      "externalPullRequestUrl": "<string>"
    }
  ],
  "count": 123
}