🐛 RDPC is not reporting `firstPublishedAt` date.

[rosibaj]

Describe the bug

RDPC is not reporting firstPublishedAt date.

Steps To Reproduce

• here is an analysis from song; i see the firstPublishedDate
• request:

  curl --location --request GET 'https://song.rdpc.cancercollaboratory.org/studies/OCCAMS-GB/analysis/c754a665-238b-47f0-94a6-65238b07f084' \

  from RDPC API this field is reported as null

• request:

  
  query test_num_in_dash {
  analyses(
  filter: {
    donorId: "DO234422"
    analysisState: PUBLISHED
    analysisType: "variant_calling"
    #analysisId: "8ebe3a61-e06c-4616-be3a-61e06ca616ce"
  }
  ) {
  info{
    totalHits
  }
  content {
    analysisId
    analysisState
    analysisType
    #analysisVersion
    updatedAt
    firstPublishedAt
    studyId
    experiment
    donors {
      # donorId
      # submitterDonorId
      specimens {
        # specimenId
        # submitterSpecimenId
        tumourNormalDesignation
    #     samples {
    #       sampleId
    #       submitterSampleId
    #       matchedNormalSubmitterSampleId
    #     }
       }
     }
    repositories{
      code
    }
    files {
      dataType
    }
    inputForRuns {
      runId
      state
    }
  }
  }
  }

## Expected behaviour
A clear and concise description of what you expected to happen.